Question

The average age of 4 sisters is 7 years. If the age of mother is included, the average is
increased by 6 years. Find the age of the mother.
(A)
40 years
38 years
(C)
(D)
37 years
36 years
पढ चकी है,​

Answer 1

Answer:

37 years

Step-by-step explanation:

let four

sisters=a+b+C+d

average=a+b+C+d/4=7

=a+b+C+d=28

average of after mother add=a+b+C+d+e/5=7+6

=a+b+C+d+e=13×5

=a+b+C+d+e=65

65-28=37