Let \( a_{n}, n \geq 1 \), be an arithmetic progression with first term 2 and common difference ...

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Let \( a_{n}, n \geq 1 \), be an arithmetic progression with first term 2 and common difference 4, Let \( M_{n} \) be the average of the first \( n \) terms. Then the sum \( \sum_{n=1}^{10} M_{n} \) is
(a) 110
(b) 335
(c) 770
(d) 1100
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