Consider a sequence of numbers given by the expression 7 + (v - 1) * 5, where n runs from 1 to 80.What is the sum of this series ?	Choose the correct option:	A) 409	B) 1636	C) 16360	D) 16000	E) 15360
terms in this sequence are 7,12,17----402   now since this is an a.p. with a common difference of 5. therefore its sum can be given as   v(a+l)/2----------------1)   v= total no. of terms =80   a= first term=7   l= last term=402   subsituting values in the expression 1 we have   80(7+402)/2   = 40(409)   =16360=16360
<result>C</result>
Consider a sequence of numbers given by the expression 7 + (v - 1) * 5, where n runs from 1 to 80.What is the sum of this series ?