Q415
The average age of a class of 6 girls is x years. Four new girls having ages x - 2, x + 2, x + 4 and x + 6 join the class. What is the new average age (in years) of the class?
A.
x + 1
AnswerB.
x + 2
C.
2 + 5x
D.
x + 2.5
Answer: Option A
Solution
Answer: Option A
Solution:
Total age of a class of 6 girls = 6xFour new girls ages = 4x + 10
Average age of 10 girls