. Sum of the number of primes between 16 to 80 and 90 to 100 is

Dear Student

Prime numbers between 16 to 80 = 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73 and 79.
number of primes between 16 to 80 = 16
Prime number between 90 to 100 = 97

number of primes between 90 to 100 = 1
Thus, Sum of the number of primes between 16 to 80 and 90 to 100 is, = 16 + 1
= 17

Thanks