360 views

The question is based on the information provided below:

From a group of seven people – $\text{J, K, L, M, N, P}$ and $\text{Q}$ – exactly four will be selected to attend a diplomat’s retirement dinner. Selection must conform the following conditions:

1. Either $\text{J}$ or $\text{K}$ must be selected, but $\text{J}$ and $\text{K}$ cannot both be selected
2. Either $\text{N}$ or $\text{P}$ must be selected, but $\text{N}$ and $\text{P}$ cannot both be selected
3. $\text{N}$ cannot be selected unless $\text{L}$ is selected
4. $\text{Q}$ cannot be selected unless $\text{K}$ is selected

Which one of the following is a pair of people who cannot both be selected to attend the retirement dinner?

1. $\text{J}$ and $\text{N}$
2. $\text{J}$ and $\text{Q}$
3. $\text{K}$ and $\text{L}$
4. $\text{K}$ and $\text{N}$

The answer is (B). $J$ and $Q$

by
878 points