Average Practice Test 2

Question : 36 of 40

Marks: +1, -0

The average age of 36 students in a group is 14 years. When teacher's age is included to it, the average increases by 1. The teacher's age in years is:

Validate

Solution:

Let the teacher's age be x years, then

{36×14+x}/37=15

⇒ 504 + x = 555

⇒ x = 51

Hence, age of teacher = 51 years

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