Question

1. Two coins are tossed once, find the probability of getting at least one head.
2. A die is thrown once. Find the probability of getting: a) An even number
b) A prime number
c) A number greater than 4
3. A bag contains 15 balls numbered 1 to 15. Find the probability of drawing a prime
number, when one ball is drawn from the bag at random.

Answer 1

Answer:

1.( p getting head). 1/2

even is 2

2 4 6 8 10 12 14 16 18 20 22 24 26

no even 13

( p getting a). 13/26. 1/2

prime no.

2 3 5 7 11 13 17 19 23

no of prime. 9/26.

4 to26

no are 22

22/26. 11/13

prime no 2 3 5 7 11 13

use formulae. ( p getting a ball) 6/15. 2/5

hope it's help