# Which one of the following partners cannot have the third highest salary?

Max.Romero on July 14, 2022

Sequence Chains

Hello Everyone, I just wanted clarification on the sequencing chains that we created when engaging in sequencing questions. I notice that when there are two variables that have no relation/an unknown relation, does this mean that each of these variables' positions in a sequence can be swappable?

Replies

jakennedy on July 15, 2022

Hi @Max.Romero,

When two variables have no direct relationship, we don’t know which of the two pieces comes first. However, this doesn’t mean that their positions are swappable because they may have different relationships with the other variables.

Consider this hypothetical:
A is before B
B is before C
C is before D
E is before D

This would diagram as follows:

A - B - C - D
E- D

A and E have no direct relationship, so A could potentially be before or after E. For example, each of the following would be acceptable.

A B C E D
E A B C D

However, we can’t just swap the letters. Take the first example again:

A B C E D

If we swapped E and A we would have:

E B C A D

Which doens’t work because A is supposed to be before B and C.

Max.Romero on July 20, 2022

Thanks Jacob, I appreciate you taking the time to clarify!

Natalie on October 16, 2022

Where is the video explanation to this question? I don't understand why the answer is Malloy. I looked at my variable and base set up and it's the same as the other videos.

Emil-Kunkin on October 26, 2022

He, this cannot be M because M is after F, and F is after I, and I is after K. Since K, I, and M must all be before M, m cannot be third