Question

4 students average age is 7. if a new student joined, then the average will be 6. what is the age of the new student?

Answer 1

Answer:

2 years.

Step-by-step explanation:

(4x7 + X)/5 = 6

28 + X = 30

X=2

Answer 2

Answer:

2

Step-by-step explanation:

let the sum of the ages of 4 students is x then average age will we

x/4=7or

x=7×4=28

therefor the sum of ages of 4 students is 28

if the age of new student joined is a then

28+a/5=6or

28+a=5×6=30

a=30-28

=2

therefor the age of new student joined is 2