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If $\pi (n)$= Number of primes less than or equal to n, n ∈ N, then what is the value of $\pi (52) $? |
12 14 15 18 |
15 |
The correct answer is option (3) :15 $\pi (52)$ Prime no. $≤ 52= 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47$ $∴\pi (52)= 15$ |
