Average Age Determination

Easy Data Sufficiency Analyzing Information

In a particular study about the ages of participants, let $a$ represent the average age of the sample group. We want to determine whether the average age $a$ is greater than 30.

Statement (1): The ages of the participants are 25, 29, 35, 42, and 40.

Statement (2): The total number of participants is 5.

Statement (1) alone is sufficient, but statement (2) alone is not sufficient.

Statement (2) alone is sufficient, but statement (1) alone is not sufficient.

Both statements together are sufficient, but neither statement alone is sufficient.

Each statement alone is sufficient.

Hint

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