Question

the average school fee par month of three boys is 425 .if average fee of two of them is 400.find monthly school fee of third boy. ​

Answer 1

Answer:

Step-by-step explanation:

Let the third boys average fee be ₹ x according to the question 425 = 400 + x , 425 - 400 = x , ₹25 = x therefore the average monthly fee of the third boy is ₹ 25

Answer 2

Step-by-step explanation:

• average of three boys=425
• sum of three boy=3×425
• =1275
• average of two boys=400
• sum of two boys=400×2
• =800
• so,

monthly fee of third boy=1275-800

=475