Question

A man saved Rs 16500 in 10 years. In each year after the first saving he saved Rs 100 more than the preceding year. Here …..
(a) a = Rs 16500, d = Rs 100
(b) S = Rs 16500, d = Rs 100
(c) S = Rs 16500, a = Rs 100
(d) tn = Rs 16500, d = Rs 100

Answer 1

Answer:

Solution

Verified by Toppr

Correct option is

D

Rs. 1200

Sn=16500,n=10,d=100

Sn=2n[2a+(n−1)d]

∴16500=210[2a+(10−1)100]

16500=5[2a+900]

16500=10a+4500

10a=12000

∴a=1200

Hence he saves Rs. 1200 in first year.