Question

The average of three numbers is 12. If two of the numbers is 13 and 15, than which is the third mum? Answer =

Answer 1

Answer:

Hence value of third number will be 8

Step-by-step explanation:

In context to questions asked

We have to determine the value of third number

As per questions

We have

The average of three numbers is 12

So, the sum of these three numbers will be,

$(12 \times 3) = 36$

As we have,

Two numbers are 13, 15

So, for determining the value of third number we will subtract the sum of two given number from the sum of three numbers

Thus we will get,

The value of third number as,

$36 - 13 - 15 = 36 - 28 = 8$

Answer 2

Answer:

8

total sum ÷ total no. = average

given is

average = 12

total numbers are three( 3 )

means 12×3 = 36 is is the sum of those no.

13,15 given no. let X be third no.

if we have 3 no. and their sum is 36 we can write them as

13+15+X = 36

28+ X = 36

X = 36-28

X= 8