Question

The average of a class of 33 students is 13 years if one girl leaves the class the average becomes 12 15/16 years what is the age of the girl

Answer 1

Step-by-step explanation:

Let sum of ages of 33 students = x years Since average. Therefore , sum of ages of 33 students Total no . of students = 13 years ⇒ x 33 = 13 years ⇒ x = 33 × 13 = 429 Now , one girl leaves , so the average becomes 12 15 16 years

Hope it helps

Answer 2

Answer:

x- total number of students except that girl

y- age of girl

x+x/33 = 13

x/32 = 207/16

x = 414

y = 15 years