Question

The average age of a class of 33 students is 13 years. if one girl leaves the class,the average becomes 182/16years. what is the age of the girl?​

Answer 1

Answer:

364 - 342 = 22

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

number of students = 33

sum of ages of students = y

average = 13

(sum of ages of students)/(number of students) = average

y/33 = 13

y = 13×33

y = 429

sum of ages of students = 429

If one girl leaves the class then the average becomes 182/16 yrs

now total number of students are 32

let age of girl = z

after one girl leaves the class then sum of ages of students = 429 - z

Now

(sum of ages of students)/(number of students) = average

(429-z) / 32 = (182/16)

429 - z = 32×(182/16)= 364

429 - z = 364

429 - 364 = z

z = 65

Age of girl = 65 years