Question

A class has certain number of students and
teachers. If one teacher having age of 33
years is added, the average age of the class
will increase by 1 year. And. If one teacher
having age of 38 years is removed, the
average age of the class will decrease by
2. What is the original average age of the
dass?
​

Answer 1

Answer:

can you send this again

Answer 2

Answer:

24

Step-by-step explanation:

xy+33/x+1 = y+1

xy+33 = xy+x+y+1 (xy cancel out)

x+y = 32 ------eq.1

xy-38/x-1 = y-2

xy - 38 = xy -2x- y +2 (again xy cancel out)

-40 = -2x-y (minus common)

2x+y = 40----2

subtract eq1 and 2

x+y = 32

2x+y = 40

-X = -8

X =8

then

8+y = 32

y = 24 so the actual average is 24