Question

the mean of 3 numbers is 7 . If two numbers are 7 and 8 . find the third number ?​

Answer 1

Answer:

Use this formula of mean is sum of observations upon that:

let the third number be x value.

(7+8+x)÷3=7

15+x=21

21-15= 6

x=6

ANSWER:

Third number is 6

Step-by-step explanation:

Hope it helps

Answer 2

Step-by-step explanation:

Let the third number be x

7 = (7 + 8 + x)/3

3 × 7 = 7 + 8 + x

21 = 15 + x

x = 21 - 15

x = 6

So the third number is 6

Hope that helps

Please mark as brainliest