Question

the mean of three numbers is 8 the mean of those three numbers and x is 7 find x​

Answer 1

Answer:

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Answer 2

Answer:

x=4

Step-by-step explanation:

Let the three no. whose mean is 8 be a,b and c

Then, (a+b+c)/3 = 8

a+b+c = 8*3

a+b+c = 24 ____ (I)

Now, ATQ

(a+b+c+x) / 4 = 7

a+b+c+x = 7*4

24 + x = 28. (From eq (I) )

x = 28-24

x = 4