Question

The mean of 40students is 15years old. The teacher with their students total mean is 16years old. then how old will be the teacher??​

Answer 1

Answer:

Teacher's age = 56 years

Step-by-step explanation:

Average = Sum of Quantities/Number of Quantities

Let x be the sum of age,

40 = x/15

x =40*15

x = 600

Total age = 600 years

1 extra person is added in Total Age.

Means, 40 + 1 = 41

Let the age of teacher be y,

New Total Age = 600 + y/41

600 + y/41 = 16

600 + y = 41*16

600 + y = 656

y = 656-600

y = 56.

Therefore, teacher's age is 56 years.