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For a charity fund, out of 21 students, 20 deposited Rs.60 each. The 21st student spent Rs.15 more than the average expenditure of all the other. The total money deposited by all of them was (in Rs.)

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For a charity fund, out of 21 students, 20 deposited Rs.60 each. The 21st student spent Rs.15 more than the average expenditure of all the other. The total money deposited by all of them was (in Rs.)
1). 1265
2). 1275
3). 1280
4). 1290


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3 vote
Answered by on | Votes 3 |

We know that, Average of 20 students = (sum of n numbers)/n

∴ x = (20 × 60)/20 = Rs60

Amount deposited by 21st student = 60 + 15 = Rs. 75

The total money deposited by all of them = 60 × 20 + 75 = Rs. 1275

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