A group has 6 students and 1 year ago, their average age was 16.5 years. If 1 more student is added in the group, the average age of the group remains same. Find the current age of new member.

A group has 6 students and 1 year ago, their average age was 16.5 years. If 1 more student is added in the group, the average age of the group remains same. Find the current age of new member.
1). 9.5 years
2). 11.5 years
3). 10 years
4). 10.5 years

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