Question

What is the average weight of the three new team members who were recently included in the team?

 

1. The average weight of the team increases by 20 kg

2. The three new men substitute the earlier members whose weights were 64 kg, 75 kg and 66 kg.
Please DO explain the approach to this problem as i dont understand how to approach this problem.

 

I am holding back the OA till tomorrow. 
OA Added.
 

 

Answer 1

Suppose x is the original weight of the team which consists of y members.

And z be the weight of the new three members.

Statement 1: The average weight of the team increases by 20 kg

The equation will be, ( x * y + 3 * z) / ( y+3) = w + 20
1 Equation and 3 unknowns to solve : INSUFFICENT

Statement 2: The three new men substitute the earlier members whose weights were 64 kg, 75 kg and 66 kg.
We only have the information of the total weight ( 205 Kg) replaced but not what was added. so we cannot solve it. INSUFFICENT
 

Let us combine both : ( x * y - 205 +  3 * z) / ( y+3) = w + 20
Still 1 equation and 3 unknowns. Hence the Answer E.

Answer 2

E,
without knowing the original no of members in the team, its not possible to find.

Comments

thanks rishi :)