Question

If w (n) = Numbers of primes less than or equal to n then w(20) is​

Answer 1

Step-by-step explanation:

w(20) = 2,3,5,7,11,13,17,19

Answer 2

Answer:

$w(n) = numbers \: of \: primes \: \leqslant n \\ w(20) = numbers \: of \: primes \: \leqslant 20 \\ = > 2,3,5,7,11,13,17,19 = 8$