Question

what is the average of first 65 natural numbers ​

Answer 1

it is in an ap

1,2,3,4........65

$a = 1 \\ common \: difference \: = d = a2 - a \\ n = 65 \\ s(n) = \frac{n}{2 } (a + l) \\ = \frac{65}{2} (1 + 65) \\ = \frac{65}{2} \times 66 \: \: \: \: \: = 65 \times 33 \\ = 2145$

$average \: = \frac{sum \: of \: all \: the \: terms}{number \: of \: terms } \\ = \frac{2145}{65 } \\ = 33 \\ is \: your \: ans \: ps \: mark \: this \: ans \: as \: the \: brainlist \:$

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