Question

Cards with numbers 1,2,3,4,...100 are placed in a box and mixed thoroughly . one card is drawn ,what is the probability that the card drawn is a prime number less than 30 ?

1)11/100
2)3/20
3)1/10
4)none of these​

Answer 1

Answer:

) Favourable cards are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, i.e., 10.

P (prime number less than 30) = 10/100 or 1/10