Question

The mean of five number is 18 , on excluding one number, the mean becomes 16, find the excluded number

Answer 1

Answer:

26

Step-by-step explanation:

Say the numbers are a, b, c, d and e.

   Mean = 18

⇒ ( a + b + c + d + e ) / 5 = 18

⇒ a + b + c + d + e = 5 × 18 = 90    ...(1)

After excluding the number e, the mean becomes 16.  So...

   New mean = 16

⇒ ( a + b + c + d ) / 4 = 16

⇒ a + b + c + d = 4 × 16 = 64    ...(2)

Subtracting (2) from (1) gives

   e = 90 - 64 = 26

Hope this helps!

Answer 2

Answer:

=26

explaination:

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