Question

5
The average marks of 5 Boys is increased
by & when one of them whose marks are.
150 is replaced by another Boy.
another Boy, what are
the marks of New Boy?​

Answer 1

Answer:

(Sum of weight of 5 men)/5=average weight of 5 men (x)  

Sum of wt. of 5 men =5x  

Let the wt. of new men =y  

Acc to q  

{(Sum of wt. of 5 men -150+y)/5}=x-3  

5x-150+y=5x-15  

y=135  

z=105 (Weight of another person which come in place of new person i.e 135-30=105)  

(Sum of wt. of 5 person -135+105)/5=M  

5x-30=5M  

x-M=30/5  

x-M=6

Step-by-step explanation: