Question

An examination hall has 6 rows of benches with 4 benches in each row. If 4 students sit on each bench, except for two benches, where only two students sit on each of them, find the total number of students in the hall.

• A. 72
• B. 70
• C. 74
• D. 76

Answer 1

The correct option is A 72

We know that counting is easier when large number of quantities are arranged in proper order.
It is given that there are in total 6 rows. Now, let's try to find out the number of students in a row as total number of students can be calculated by multiplying the total number of rows with total number of students in each row.

Given: 4 students sit on each bench, except for two benches, where only two students sit on each of them.

$\Rightarrow \text{Total number of students in a row}$
$=2\times 4+2\times 2$
$=8+4$
$=12$

$\Rightarrow \text{Total number of students}=12\times 6$
$=72$