Question

the average of age of 30 boys of a class is equal to is 14
years when the age of the teacher is included the average​

Answer 1

Answer:

Sum of Total age without teacher = 30 * 14 = 420 yrs. Sum of total age including teacher = 31 * 15 = 465 yrs. So age of teacher = 465 yrs.

Step-by-step explanation:

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