A prime number is a number that is evenly divisible only by 1 and itself. The prime

Question:

A prime number is a number that is evenly divisible only by 1 and itself. The prime numbers less than 100 are listed below.
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
Choose one of these numbers at random. Find the probability that
a. The number is even
b. The sum of the number’s digits is even
c. The number is greater than 50