Eleven friends spent Rs. 18 each on a tour and the twelfth friend spent Rs. 11 less than the average expenditure of all twelve of them. What is the total money spent by twelve friends?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Rs. 204.
Let the average expenditure of all twelve be given by A
Expenditure of the twelfth person = A - 11
Total expenditure = 18 × 11 + A -11
A = Total expenditure / 12
⇒ 12A = 198 +A - 11
⇒ 11A = 187
⇒ A = 17
Hence, the total money spent by the 12 friends = 198 + 17 - 11 = 204