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**