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Eleven friends had a tea party. All boys...

Eleven friends had a tea party. All boys took only coffee and all girls took only tea. The cost per cup of coffee in rupees is numerically one more than the number of girls and the cost per cup of tea in rupees is numerically equal to the number of boys. If the ratio of the total expenses of the boys and the girls is ` 7 : 6`, then what is the cost of each coffee ? (In Rs.)

A

4

B

5

C

6

D

7

Text Solution

Verified by Experts

The correct Answer is:
D
(i) Let the number of boys be 'b' and number of girls be 'g'.
(ii) Expenses of each boy = g + 1 ,
expenses of each girl = b + 1.
(iii) `(b(g+1))/(g(b)) = 7/6`.
(iv) Solve b + g = 11 and the above equation and get(g + 1 ) in Rs.
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