Solution:
Given that, Deepa has to buy a scooty. She can buy scooty either making cash down payment of ₹ 25,000 or by making 15 monthly instalments as below.1st month , 2nd month, 3rd month , 4th month and so on.
Here the common difference between instalments is,
d = 3225 – 3425
d = -200
If a is the first term, d is the common difference, the sum of the first n terms is given by,
Let us find the amount paid in 15 installments.
Here, a = 3425
d = -200
n = 15
Calculate the total amount paid in 15 installments.
So, the total amount paid by Deepa is ₹30375.
Hence, option (1) is correct.