# Seven friends spent Rs. 14 each on a project. The eighth friend spent Rs. 21 more than the average expenditure of all. What is the amount of total mon

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Seven friends spent Rs. 14 each on a project. The eighth friend spent Rs. 21 more than the average expenditure of all. What is the amount of total money spent by them ?
1. 136
2. 133
3. 134
4. 132

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Correct Answer - Option 1 : 136

Given:

Seven friends spent Rs.14 each on a project. The eighth friend spent Rs.21 more than the average expenditure of all.

Concept used:

Average

Calculation:

Let the average expenditure of all eight friends be Rs. x

Seven friends spend Rs.14 on a project

Sum = 14 × 7 = Rs.98

As per the question

⇒ $\frac{{98\ +\ x\ +\ 21}}{8} = x$

⇒ x + 119 = 8x

⇒ 7x = 119

⇒ x = 17

Total amount spend by them all

⇒ 98 + (17 + 21) = Rs.136

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