Question

Amit saves certain amount every month in a specific way . In the first month he saves Rs . 200 ,in the second month he saves Rs.250 ,in the third month he saves Rs.300 and so on .How much will be his total savings in 17 months ?
Answer the following question in Arithmetic progression method !
Answer should be respective and correct otherwise I will report!!!!​

Answer 1

10200

a=200, d= 50, n=17

Now,

Sn= n/2{2a+(n-1)d}

=17/2{2×200+(17-1)50}

=17/2(400+800)

=17/2×1200

=17×600

=10200