Question

Find the value of 2 1/3 ÷ 9/25​

Answer 1

Answer:

Correct option is

D

169

We take the first term =a=1, last term =l=25, common difference =d=2 and the number of terms =n.

Then, since it is an A.P. series,

n=

d

l−a

+1

=

2

25−1

+1

=13.

Let S

n

be the sum of n=13 terms

∴S

n

=

2

n

×(a+l)

=

2

13

×(25+1)

=13×13=169.

So the required sum =169.