Question

The average of 7 consecutive numbers is 20. The largest of these numbers is :
A) 21
B) 22
C) 23
D) 24

Answer 1

C) 23  is correct answer

Answer 2

Answer:

23

Step-by-step explanation:

Let the numbers be x, x + 1, x + 2,  x + 3, x + 4, x + 5 and x + 6,

Then   (x + (x + 1) + (x + 2) + (x + 3) + (x + 4) + (x + 5) + (x + 6)) / 7 = 20.

or  7x + 21 = 140 or 7x = 119 or x =17.

Latest number = x + 6 = 23.

Subject: Average - Quantitative Aptitude - Arithmetic Ability