Term 3 Probability Two Marks Questions

9th Standard

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Maths

Time : 00:45:00 Hrs
Total Marks : 20
10 x 2 = 20
1. What is the probability of throwing an even number with a single standard dice of six faces?

2. There are 24 balls in a pot. If 3 of them are Red, 5 of them are Blue and the remaining are Green then, what is the probability of picking out (i) a Blue ball, (ii) a Red ball and (iii) a Green ball?

3. Frame two problems in calculating probability, based on the spinner shown here.

4. A company manufactures 10000 Laptops in 6 months. In that 25 of them are found to be defective. When you choose one Laptop from the manufactured, what is the probability that selected Laptop is a good one.

5. If a probability of a player winning a particular tennis match is 0.72. What is the probability of the player loosing the match?

6. What is the probability that a number selected from the numbers 1, 2, 3, ..., 25 is prime number when each of the given numbers is equally likely to be selected?

7. Tickets numbered from 1 to 20 are mixed up together and then a ticket is drawn at random. What is the probability that the ticket has a number which is a multiple of 3 or 7?

8. A bag contains 3 red and 2 blue marbles. A marble is drawn at random. What is the probability of drawing a blue marble?

9. Two dice are thrown simultaneously. Find the probability of getting
(i) an even number as the sum.
(ii) atotal of at least 10
(iii) a doublet of even number.

10. An urn contains 10 red and 8 white balls. One ball is drawn at random. Find the probability, that the ball drawn is white.