Question

100 cards are numbered from 1 to 100. Find the probability of getting a prime number. * 1 point (A) 3/4 (B) 27/50 (C) 1/4 (D) 29/100

Answer 1

Answer:

total number of cards = 100

prime numbers between 1 and 100 = 25

p(getting a prime number) =  favourable outcomes / total outcomes

  = 25/100 = 1/4 = 0.25

Answer 2

Given:

100 cards are numbered from 1 to 100.

To find:

Find the probability of getting a prime number.

Solution:

From given, we have,

100 cards are numbered from 1 to 100.

The number of prime numbers from 1 to 100 are:

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97,

Therefore, there are a total of 25 prime number, then the cards having prime numbers between 0 to 100 are 25.

Therefore, the probability of getting a prime number is,

P (prime number) = 25/100 = 1/4

Option (C) 1/4 is correct.