Question

A man buys every month certificates of value exceeding the last year's by Rs 25. In 25th year the
total value of the certificates purchased by him is Rs 7250. Find the value of the certificates bought
by him in the 13th year.
(A) 6960
(B) 6950
(C) 6910
(D) 5950
​

Answer 1

Answer:

B) 6950

Step-by-step explanation:

The given data is in arithmetic progression with the amount in the beginning be a and the common difference d is given by 25

Amountin nth year is given by the formula a + (n-1)×d

By data amount in 25 th year = 7250

Amount in 25 th year is given by a + 24×d

a+ 24×d= 7250

a+ 24× 25= 7250

a= 7250 -600

a=6650

Now the amount in the 13 th year is given by a+12d

6650+ 12×25= 6650 +300= 6950