(11^2 + 12^2 + 13^2 + ... + 20^2) = ?

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Question

(11^2 + 12^2 + 13^2 + ... + 20^2) = ?

Options:

A . 385

B . 2485

C . 2870

D . 3255

Answer: Option B
Answer: (b).2485

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