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1. David obtained 76, 65, 82, 67 and 85 marks (out of 100) in English, mathematics, physics, chemistry and biology. What are his average marks?

A. 65

B. 69

C. 75

D. None of these

Solution:

\begin{aligned} Average \\ = \frac{76 + 65 + 82 + 67 + 85}{5} \\ = \frac{375}{5} \\ = 75 \\ Hence, average = 75 \end{aligned}

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