If $\pi (n)$= Number of primes less than or equal to n, n ∈ N, then what is the value of $\pi (52) $?
Answer & explanation
Correct answer: option 3
The correct answer is option (3) :15
$\pi (52)$
Prime no. $≤ 52= 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47$
$∴\pi (52)= 15$