(b) in the month having 31 days If a family member is chosen at random, compute the probability that it has : Required probability = P(0 heads) + P(1 head) (ii) Find the probability that a student obtained marks 60 or above. Answer. 21. 4. (a) in 18-29 years of age and likes type II movies Answer. Answer. Probability = Numbers of families having 0 girls/Total numbers of families [CBSE-14-ERFKZ8H], [CBSE-14-17DIG1U] Q.4. 3. Filed Under: CBSE, Class 9 Maths Tagged With: CBSE 9 Probability ., CBSE Class 9 Mathematics, CBSE Important Questions for Class 9 Mathematics, RD Sharma Class 11 Solutions Free PDF Download, NCERT Solutions for Class 12 Computer Science (Python), NCERT Solutions for Class 12 Computer Science (C++), NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 12 Micro Economics, NCERT Solutions for Class 12 Macro Economics, NCERT Solutions for Class 12 Entrepreneurship, NCERT Solutions for Class 12 Political Science, NCERT Solutions for Class 11 Computer Science (Python), NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 11 Entrepreneurship, NCERT Solutions for Class 11 Political Science, NCERT Solutions for Class 11 Indian Economic Development, NCERT Solutions for Class 10 Social Science, NCERT Solutions For Class 10 Hindi Sanchayan, NCERT Solutions For Class 10 Hindi Sparsh, NCERT Solutions For Class 10 Hindi Kshitiz, NCERT Solutions For Class 10 Hindi Kritika, NCERT Solutions for Class 10 Foundation of Information Technology, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 9 Foundation of IT, PS Verma and VK Agarwal Biology Class 9 Solutions, Important Questions for CBSE Class 9 Mathematics Chapter 8 Probability, Chapter 4 Linear Equations in Two Variables, Chapter 5 Introduction to Euclid Geometry, Chapter 9 Areas of Parallelograms and Triangles, CBSE Important Questions for Class 9 Mathematics, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, Periodic Classification of Elements Class 10, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, CBSE Previous Year Question Papers Class 12, CBSE Previous Year Question Papers Class 10. Question 1. Probability Class 9 Notes are provided here at BYJU'S. Solution: A dice is rolled number of times and its outcomes are recorded as below : Two dice are thrown simultaneously 500 times. A company selected 4000 households at random and surveyed them to find out a relationship between the level and the number of television sets in a home. Justify your answer. Now, x + 2x + 3x =360 In a medical examination of students of a class, the following blood groups are recorded : Answer. The table shows the marks obtained by a student in unit tests out of 50 : Q. Answer. Can the experimental probability of an event be a negative number? Only patriotism with violence is very dangerous. Answer. The number of times ‘2 Tails’ appeared was three times ‘No Tail’ appeared and the number of times ‘1 tail’ appeared is double the number of times ‘No Tail’ appeared. Only patriotism with violence is very dangerous. Probability of getting a prime = 3/6 =1/2, 6. Find the probability of number of people : Important Questions for CBSE Class 9 Mathematics Chapter 8 Probability The topics and sub-topics in NCERT Solutions for Class 9 Maths Chapter 15 Probability are: Probability Introduction Probability – An Experimental Approach Summary IMPORTANT QUESTIONS VERY SHORT ANSWER TYPE QUESTIONS 1. Answer. What is the probability that it has : Probability = Numbers of families having 1 girls/Total numbers of families, (iii)Numbers of families having no girls = 211 =>p=11 / 18 Answer. 20. Check the below NCERT MCQ Questions for Class 9 Maths Chapter 15 Probability with Answers Pdf free download. So, we should obey the traffic rules as life is very precious. A die is thrown six times and number on it is noted as given below : [CBSE March 2012] Solution: Total number of bags present = 11 Can the experimental probability of an event be greater than 1? A box contains 50 bolts and 150 nuts. To acquire good result they can reach important questions of class 9 Maths chapter-wise here at BYJU’S. Important probability questions for class 9 maths chapter 15 are provided here with solutions. As the number of tosses of a coin increase, the ratio of the number of heads to the total number of tosses will be ½. An insurance company selected 2000 drivers at random (i.e., without any preference of one driver over another) in a particular city to find a relationship between age and accidents. .-. 750 families with 3 children were selected randomly and the following data recorded 15.If the probability of winning a race of an athlete is 1 / 6 less than the twice the probability of losing the race. =>6x=360 What is the probability that the driver chosen at random Also, the probability that student get less than 70%. Number of events for getting less than three tails = 68 + 82 + 30 = 180 therefore P( coming 2 heads)= 514 / 642 = 9/ 25, SHORT ANSWER QUESTIONS TYPE-I Number of bags containing more than 5 kg of flour = 7, Therefore, the probability that any of the bags chosen at random contains more than 5 kg of flour = 7/11. 4. [CBSE-14-ERFKZ8H], [CBSE-14-17DIG1U] The information gathered is listed in the table below: Suppose a family is chosen. Learn the definition with an example here and solve the extra questions to understand the concept and score in the exam. Hence, here we are providing the most significant problems and solutions for upcoming examination along with additional questions to give students a better practice. Les différentes façons d'exprimer la probabilité d'un événement Réussissez 5 questions sur 7 pour passer au niveau supérieur ! Here, in 6 trials, each number occur once and total prime numbers i.e., 2, 3, 5 occur one time each Answer. (ii) less than 82 plants survived in a colony ? We have provided Probability Class 10 Maths MCQs Questions with Answers to help students understand the concept very well. [CBSE-15-NS72LP7] Q.7: A die is thrown 1000 times with the frequencies for the outcomes 1, 2, 3, 4, 5 and 6 as given in the following table : Find the probability of getting each outcome. 22. well done byjus Register online for Maths tuition on Vedantu.com to score more marks in your examination. therefore P(ablueball)= z /(x+y+z ), 10. Sample space) = n(S) = 364, Now, total workers who are not married = n(E) = 364 – 91 = 273, Method 1: So, P(not married) = n(E)/n(S) = 273/364 = 0.75, Method 2: P(married) + P(not married) = 1. (i) Find the probability that a student obtained less than 20% in the mathematics test. 100 plants were sown in six different colonies A, B, C, D, E, and E After 31 days, the number of plants survived as follows ; P(not E) = 1 – P(E) P(getting an odd number) = 138/250=69/125, 3. Free download Probability Class 9 Extra Questions with Answers in PDF .Ribblu launches platform for supplying free download of CBSE Sample board exam papers & worksheets from nursery to class 12th Quiz 1. Answer. Practising these questions will help students to score good marks in this chapter. (iii) which value are depicted from above data ? [NCERT Exemplar Problem] (iii) used at least one kind of mode of transport ? Value Based Questions The table shows the marks obtained by a student in unit tests out of 50 : Find the probability that the student get 70% or more in the next unit test. Answer. Required probability = 273 / 364 =0.75, 7. Answer. [CBSE-15-NS72LP7] You also get idea about the type of questions and method to answer in your Class 9th examination. Number of children do not like potato chips = 364 – 91 = 273 273 If the three coins are simultaneously tossed again, compute the probability of getting less than 3 tails. Total number of outcomes = Sample space = 360, Now, assume that the number of times ‘No Tail’ appeared to be “x”, So, the number of times ‘2 Tails’ appeared = 3x (from the question), Also, the number of times ‘1 Tail’ appeared =2x (from the question), ∴ P(getting two tails) = (3 × 60)/360 = ½. Q.6: 1500 families with 2 children were selected randomly, and the following data were recorded: Compute the probability of a family, chosen at random, having. Probability of getting less than 3 tails =180 / 200 =9 / 10. Answer. (c) takes a halt after covering 155 km ? A travel company has 100 drivers for driving buses to various tourist destination. These questions are in accordance with the NCERT curriculum prescribed by the CBSE board for the current academic session. Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes : Total balls = x + y + z Two coins are tossed simultaneously for 360 times. [CBSE-15-6DWMW5A] (i) used car and scooter only ? Find the probability that a person chosen at random is : Type III —> Romantic, Comedy and Family In a factory of 364 workers, 91 are married. (a) takes a halt after covering 80 km ? (i) Number of students who obtained less than 20% in the mathematics test = 7, The probability that a student obtained less than 20% in the mathematics test = 7/90, (ii) Number of students who obtained marks 60 or above = 15+8 = 23, The probability that a student obtained marks 60 or above = 23/90.