Question

A number is chosen at random from the first twenty five natural numbers.calculate the probability that the integer is divisible by 3or 5.

Answer 1

12/25 is probability

Answer 2

A no. is chosen at random from first 25 natural numbers.
Sample space,
S={1, 2, 3, 4,............ 25}
n(s)=25
Getting integer divisible by 3 or 5.
A={3, 6, 9, 12, 15, 18, 21, 24, 5, 10, 20, 25}
n(A)=12
p(A)= n(A)/n(s)=12/25