The Cricket Set Cost Problem is as follows :

**Question:** The coach of a cricket team buys 3 bats and 9 balls for Rs 3900.

Later, he buys another bat and 2 more balls of the same kind for Rs 1200.

Find the price of a bat and a ball?

**Answer:** Let the price of a bat be Rs x and that of a ball be Rs y.

It is given that 3 bats and 9 balls are bought for Rs 3900.

So, 3x+9y=3900 ………………… (1)

and it is given that one bat and 2 balls of the same kind cost Rs 1200.

That is, x+2y=1200 …………….. (2)

=> x=1200-2y …………………….(3)

putting this value in equation (1), we get

3(1200-2y) +9y=3900

=> 3600-6y+9y=3900

=> 9y-6y=3900-3600

=> 3y= 300

=> y=300/3

=> y=100

Hence Ball = 100 Rs

Putting the value of y in equation (3)

x=1200-2y

x=1200-2*100

x=1200-200

x=1000

Hence Bat = 1000 Rs.

**So, the cost of the Bat is Rs.1000 and the Ball is Rs.100 **