Question

Average of 7 digits is 40. Among these digits the average of 3 digits is 28. Find the average of other digits.

Answer 1

Answer:

25

Sum of 6 numbers =60×30=180

Sum of first 4 numbers =4×25=100

Sum of last 3 numbers =3×35=105

∴ Fourth number =(100+105)−180

=205−180

=25