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Class 9 Maths Chapter 15 Probability Quiz 2 (25 MCQs)

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1. You have a bag of 17 marbles. 4 are blue, 6 are green, 2 are red, and the others are yellow (5). What is the probability of drawing a green marble, putting it aside, and then drawing another green marble?
2. A number is chosen at random from 1 to 50. Find the probability of selecting numbers with a last digit of 4.
3. The probability of an event that cannot happen is
4. There are 6 red marbles, 5 green marbles, and 4 yellow marbles in a bag. If Joe picks 2 marbles one after the other without replacement, then what is the probability that both are red in color?
5. Probability of an Event 'E' + Probability of the event 'not E' is
6. The letters that form the word ALGEBRA are placed in a bowl.What is the probability of choosing a letter that is NOT "A" ?
7. An experiment consists of rolling a fair number cube. Find the theoretical probability of rolling an 8.
8. A die is rolled once. What is the probability of rolling a 5 or a 6? Your answer should be a fraction in simplest form.
9. An action which results in some well-defined outcomes is called .....
10. The cafeteria is serving three kinds of sandwiches:tuna (T), chicken, (C), and peanut butter (P). They are also serving a choice of two drinks:milk (M) or water (W). Which is the complete set of possibilities of combinations?
11. A number is chosen at random from 1 to 10. Find the probability of selecting an odd number.
12. Find the probability of rolling an even number.
13. A box contains 50 bolts and 150 nuts. On checking the box, it was found that half of the bolts and half of the nuts are rusted. If one item is chosen at random, find the probability that it is rusted.
14. In a sample study 642 people, it was found that 514 people have high school certificate. If a person is selected at random, then the probability that the person has a high school certificate is
15. Which of the following cannot be the empirical probability of an event?
16. In a statistics class there are 18 juniors and 10 seniors; 6 of the seniors are females, and 12 of the juniors are males. If a student is selected at random, find the probability of selecting a junior or a female.
17. The probability of any event of an experiment is .....
18. The probability of guessing the correct answer to a certain question is x/ 2.If probability of not guessing the correct answer is 2 /3 then find x
19. The probability based on the concept of relative frequency theory is called
20. What is the probability of impossible events?
21. Empirical probability is also known as
22. A collection of one or more outcomes of an expperiment is called
23. A die is rolled once. What is the probability of rolling a number less than 1? Your answer should be a fraction in simplest form.
24. A coin is tossed twice. What is the probability of getting atleast one head?
25. A coin is tossed 40 times and it showed tail 24 times. The probability of getting head is .....
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