Question

Lottery tickets bear numbers from 10 to 99. A ticket selected at random will bear a prime number. what is the probability of this event. ​

Answer 1

Given:

Numbers between 10 to 100

To Find:

Probability that a given number is a prime number

Solution:-

First, we should find out how many prime numbers are there between 10 to 100:-

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

So, there are 21 prime numbers between 10 to 100.

Probability of finding a prime number = Number of prime numbers / Total of the given numbers

= 21 / 91 = 0.23

The probability of finding a prime number between 10 to 100 is 0.23