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Qn #1699
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Mean of first $n$ natural numbers $=\dfrac{n+7}{3}$. Find $n$:
A.
$9$
B.
$10$
C.
$11$
D.
$12$
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❓ Question: Mean of first $n$ natural numbers $=\dfrac{n+7}{3}... | TANCET Group Studies | Tancet Group Studies