A prime number is a number that is evenly divisible only by 1 and itself. The prime numbers less than 120 are listed below. Round to three decimal places.
2 3 5 7 11 13 17 19 23 29 31 37 41
43 47
53 59 61 67 71 73 79 83 89 97 101 103 107
109 113
When choosing one number at random. Find the probability that:
a) The number is even.
b) The sum of the number's digits is even. (Meaning, when you add the digits together, the sum is an even number, hint 11 is the first)