If a1, a2, a3, … are in A.P. such that a1 + a7 + a16 = 40, then the sum of the first 15 terms of this A.P. is:

If a1, a2, a3, … are in A.P. such that a1 + a7 + a16 = 40, then the

1.	If a1, a2, a3, … are in A.P. such that a1 + a7 + a16 = 40, then the sum of the first 15 terms of this A.P. is:
A.	200
B.	280
C.	120
D.	150
Answer» B. 280

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If a1, a2, a3, … are in A.P. such that a1 + a7 + a16 = 40, then the sum of the first 15 terms of this A.P. is:

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