CAT 2000 — QA Question 6
Basics of AverageEasy
Consider a sequence of seven consecutive integers. The average of the first five integers is n. The average of all the seven integers is
Answer & solution
- A
n
n + 1
- C
K × n, where K is a function of n
- D
n + (2/7)
Solution
Average of first five integers is n.
∴ The integers are (n – 2), (n – 1), n, (n +1), (n + 2).
∴ The last two numbers are (n + 3), (n + 4).
∴ The average of the seven numbers = (7n + 7)/7 = n + 1
Hence, option (b).