Question

IF the mean of 7 ,4 ,x and 10 is 8 find the value of x is-?
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Answer 1

7 + 4 + x + 10 = 8 × 4

21 + x = 32

x = 32 - 21

x = 11

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Answer 2

8=7+4+x+10/4
8×4=7+4+10+x
32=21+x
32-21=x
11=x
x=11
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