There are 8 teachers in a school. When a 35 year old teacher was transferred and another teacher joined, the average age ws increased by 2 years. How old the new teacher?
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There are 8 teachers.
Let the total age be A.
Then avg age = A/8.
the average age was increased by 2 years means whosoever has come is of greater age than who has left.
New average = A/8 + 2
Increment in total age = 8 x 2 = 16.
New teacher's age = 35 + 16 = 51.
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