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Forget conventional ways of solving math questions. For DS problems, the VA (Variable Approach) method is the quickest and easiest way to find the answer without actually solving the problem. Remember that equal numbers of variables and independent equations ensure a solution.

The first step of VA (Variable Approach) method is modifying the original condition and the question, and rechecking the number of variables and the number of equations.

Modifying the question:

The median of 5 data values is the third highest value. So, the question is asking for the third highest value.

Condition 1)

Condition 1) tells us that the third highest value is 15.

Therefore, condition 1) is sufficient.

Condition 2)

Condition 2) tells us nothing about the third highest value.

This condition is NOT sufficient.

Therefore, A is the answer.

Answer: A

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