A group of kittens went on sale and 2/3 of theme were sold for Tk. 30 each. If none of the 36 remaining kittens were sold, what was the total amount (Tk.) received for the kittens that were sold?

A 180

B 135

C 90

D 60

Correct Answer: Option E

If the amount of kittens is 1, then remaining amount of kitten unsold is = 1 - 2/3 = (3-2)/3 = 1/3

Now,

Remaining amount of kittens is 1/3, when total amount of kittens is 1

Remaining amount of kittens is 36, when total amount of kittens is 1*36*3 = 108

Kittens sold = 108 -36 = 72

Total amount received = (72*2.30) tk

= 165.6 tk