1.

The average of 5 consecutive numbers is 18. If next 2 numbers are also included, then what will be the new average?1). 18.52). 193). 19.54). 20

Answer»

Let the 5 consecutive number be (x - 2), (x - 1), (x), (x + 1), (x + 2)

The SUM of above consecutive number = 5x

⇒ Average of numbers = 18

⇒ The sum of consecutive number/5 = 18

⇒ 5x/5 = 18

⇒ x = 18

If 2 more numbers are INCLUDED, we get

The numbers are (x - 2), (x - 1), (x), (x + 1), (x + 2), (x + 3), (x + 4)

⇒ Sum = 7X + 7

Average = 7(x + 1)/7 = x + 1 = 18 + 1 = 19.


Discussion

No Comment Found

Related InterviewSolutions