Question

The mean of 40 students is 15 years. Their mean with teachers is 16 years. Then what is the age of teachers ?​

Answer 1

Answer:

mean of 40 students = 15 years....

mean of 40 students + teacher = 16 years

sum of age of students / 40 = 15

sum of age of students = 15 x 40

sum of age of students = 600

(sum of age of students + teacher )/ 41 = 16

(600 + age of teacher)= 16 x 41

600 + age of teacher = 656

age of teacher = 656 - 600

age of teacher = 56 years

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