Question

a box contains balls number 5 to 30 a ball is drawn from the box the probability that the ball drawn has prime number is​

Answer 1

7/25

as total are 25

and prime numbers are 7

so answer is 7/25

Answer 2

Dear Student,

◆ Answer -

Probability that the ball drawn has prime number = 4/13

● Explanation -

Total numbers between 5 to 30 are -

Set S = {5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30}

n(S) = 26

Prime numbers between 5 and 30 are -

Set A = {5, 7, 11, 13, 17, 19, 23, 29}

n(A) = 8

So probability that the ball drawn has prime number​ -

P(A) = n(A)/n(S)

P(A) = 8/26

P(A) = 4/13

So, the probability that the ball drawn has prime number is 4/13.

Thanks dear. Hope this helps..