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If a2,a2 a3,... are terms of AP such that a1 + a5 + a10 + a15 + a20 + a24 = 225, then the sum of first 24 terms is

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If a2,a2 a3,... are terms of AP such that a1 + a5 + a10 + a15 + a20 + a24 = 225, then the sum of first 24 terms is

(a) 9 x 102 

(b) 9 x 103

(c) 10 x 92 

(d) 10 x 93

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Best answer

Correct option: (a) 9 x 102

Explanation: 

We know that,

Sum of first n terms of an AP is given as:

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