Numbers & Algebra

1:

Six men A, B, C, D, E, F agree with a seventh man G to provide a sum of money among them. A, B, C, D, E, F are to subscribe Rs.10 each, and G is to pay Rs.3 more than the average of the seven. What is the whole sum to be provided?

A.

Rs.73.50

B.

Rs. 74

C.

Rs. 73

D.

Rs. 72.50

 

Answer : A

Explanation :

let average of the seven men be x
∴ x = (10x6+(x+3)) / 7
=> 60 + x +3 = 7x
=> x = 63/6 = 10.5
Toal amount = 10.5 x 7 = 73.5

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Option: A

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