Question

Please answer fast

''The average of 6 numbers is 12. Three of the numbers are:
18, 16, 11
If the three missing numbers are of the same value, what is the value of each missing number?''

Answer 1

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Answer 2

The value of each missing number is 9.

Explanation:

Given that:

Average of 6 numbers = 12

The numbers 18,16 and 11 are given.

As the other three numbers are of same value.

Let,

x be the missing number.

Sum of all numbers = 18+16+11+x+x+x

Sum of all numbers = 45+3x

Average =
`(Sum\ of\ quantities)/(Number\ of\ quantites)`

`12=(45+3x)/(6)\\12*6 = 45+3x\\72=45+3x\\72-45=3x\\27=3x\\(3x)/(3)=(27)/(3)\\x=9`

Hence,

The value of each missing number is 9.