Question

The following amounts are the income for 5 days calculated by a man.

₹760, ₹820, ₹745, ₹782 and ₹779.

If the average income is ₹775 for 6 days, what is the income on the sixth day?

• A. ₹769
• B. ₹760
• C. ₹764
• D. ₹774

Answer 1

The correct option is C ₹764

The sum of income of 5 days
= ₹760 + ₹820 + ₹745 + ₹782 + ₹779 = ₹3886

Let the income on the sixth day be ₹x

Average income for six days = ₹775

Total income for six days = 775 $\times$ 6 = ₹4650

As per question,

₹3886 + ₹x = ₹4650

$\Rightarrow$ ₹x = ₹4650 - ₹3886 = ₹764