Question

the average of three numbers is 8 .the first two number are 5,12 find the third numbers​

Answer 1

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6

The sum of the numbers will be 8*3=24. 11+7=18 and 24-18=6. So the last number is 6. The average of 6, 7, 11 is 8. So the third number is 6.

Answer 2

Answer:

-1

Step-by-step explanation:

Average = Sum of all terms ÷2

Therefore let the third term be x

5+12+x ÷2 = 8

17+x÷2=8

17+x = 8 ×2

17+x = 16

x= 16-17

x= -1

The third term i.e the third number is -1.