Question

The average of three numbers is 5,If the sum of the first two numbers is 6,then Find the third number​

Answer 1

Answer: If the average of  

3

numbers is  

5

, then the sum has to be  

3

×

5

=

15

Call the missing number  

x

.

Then  

x

+

6

=

15

x

=

15

−

6

x

=

9

Answer 2

Answer:

39

Step-by-step explanation:

x+y+z/3=5

x+y+z=15----1

x+y=6---2

6+z/3=15

6+z=45

z=45-6

z=39

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