Question

A bag contains 19 balls bearing 1,2,.............19. A ball is drawn at random. Find the probability that no .on the ball is
1) perfect square
2) divisible by 3 or 5
3) prime number . ​

Answer 1

Answer:

perfect square

Step-by-step explanation:

i think

Answer 2

Answer:

P(A) = 4/19

P(B) = 8/19

P(B) = 8/19

Step-by-step explanation:

A bag contains 19 balls bearing 1 , 2 ,............. 19 and a ball is drawn at random

S = { 1 , 2 , ............., 19 }

n(S) = 19

Let A be the event of getting a perfect square

A = { 1 , 4 , 9 , 16 }

n(A) = 4

P(A) = n(A)/n(S) = 4/19

Let B be the event of getting a number which is divisible by 3 or 5

B = { 3 , 5 , 6 , 9 , 10 , 12 , 15 , 18 }

n(B) = 8

P(B) = n(B)/n(S) = 8/19

Let C be the event of getting a prime number

C = { 2 , 3 , 5 , 7 , 11 , 13 , 17 , 19 }

n(C) = 8

P(C) = n(C)/n(S) = 8/19