Question

A bag contains cards numbered from 1 to 25. A card is drawn at random from the bag. The probability that the number on this card is divisible by 3 or 5

Answer 1

3,6,9,12,15,18,21,24,5,10,15,20,25 = 13
so cards = 25 - 13 = 12
probability = 12/25

Answer 2

S={1,2,3......25}
n(S)=25

let,event A be the card drawn is divisible by3 or 5
A={3,6,9,10,12,15,18,20,21,24,25}
n(A)={11}
SO,
P(A)=n(A)/n(S)
=11/25.....ANS