Question

You work as a lab assistant. Each morning you are responsible for grouping the correct number of test tubes for

Answer 1

Answer:

Option D is correct.

Step-by-step explanation:

In total 40 test tubes are required for 12 experiments.

The first two experiments will require 4 test tubes for each.

Hence, there will be a requirement of $4\times2$ = 8 test tubes.

Six experiments require 3 test tubes each.

Hence, these 6 experiments will take $6\times 3=$ 18 test tubes.

Other 2 experiments will take 2 test tubes.

Here, $2\times2$ = 4 test tubes will be required.

Till now a total of (8 + 18 + 4) = 30 test tubes have been used.

The remaining number of test tubes is (40 - 30) = 10.

The remaining experiments require $\frac{10}{2} = 5$ test tubes.

The first calculation to perform is 2(4) + 6(3) - 2(2).