Lead with the fact that the aggregate masks materially different segment behavior.

That is the business insight. The average alone would suggest stability, while the segment split may imply changing mix, customer risk, or a growth opportunity.

Quantify the two contrasting trends, explain which segment drives the change, and connect the difference back to the case objective.

Do not narrate every cell. State the aggregate, the hidden divergence, and why the divergence matters. case interview guide.

This is one of those exhibits where the average is almost the least interesting number.