Question

. The average age of 28 boys of a class is equal
to 15 years. When the age of the class teacher
is included the average becomes 16 years.
Find the age of the class teacher.
(a) 45 years
(b) 42 years
(c) 40 years
(d) 44 years​

Answer 1

Answer:

Average age of 29 boys =14 years

Average age of 29 boys =14 yearsWhen teacher included average =15 years

Average age of 29 boys =14 yearsWhen teacher included average =15 yearsAge of teacher =30×15−29×14

Average age of 29 boys =14 yearsWhen teacher included average =15 yearsAge of teacher =30×15−29×14=450−406=44 years.

Step-by-step explanation:

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