Question

In a class their are 40 boys and their average age is 16 years.1 boy, as 17 years leaves the class and another join the average becomes 15.875.The age of the new boy is?​

Answer 1

Step-by-step explanation:

Sum of age of 40 boys

= 16 × 40 = 640

New age of 40 boys

= 15.875 × 40 = 635

Difference = 640 - 635 = 5 years

17 - x = 5

x = 17 - 5 = 12 years

hope it helps h

Answer 2

40*16=640

640÷40=16

means640-17=total age of39 students

623=age of 39 students

tolal age now of student =15.875×40

age of new students =(15.875×40)-(623)

Step-by-step explanation:

now use calculator

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