The total age of a group of parents is 342 yrs. A new parent aged 48 yrs joins the group, their average age rises by...

The total age of a group of parents is 342 yrs. A new parent aged 48 yrs joins the group, their average age rises by 1.
Find the original number of parents given that they were more than 30.

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sharon kalunda answered the question on May 2, 2019 at 11:19

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