Math, asked by nisha191, 1 year ago

the average age of 5 boys in a class is y years. Find an expression for the average age of class after a boy of z years join the class.

Answers

Answered by DivySrivastava23

(a+b+c+d+e)/5 = y
When z comes in...

y+z/5=(a+b+c+d+e+z)/5 = y

Hope This Helps..

DharamveerSingh: so 5y+z/6

DharamveerSingh: this is the new average

NUTROLLER: 5 is already denoted as y so no need to 5y.

DivySrivastava23: Yes

DharamveerSingh: no

DharamveerSingh: y is not 5

DharamveerSingh: a+b+c+d+e/5=y

DharamveerSingh: that's why I write,,, 5y+z is new total of class

DharamveerSingh: and now total =6

DharamveerSingh: so average is 5y+z/6

Answered by NUTROLLER

Hey there!
Average age of 5 students= y (yrs)
Then one more student joins = z
Average = Total of sum/Number of students
Hence,
Y+Z/6

DharamveerSingh: sorry,,, it's wrong

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