Question

1. If the mean of 12, x, 5, 7 and 13 is 9. Find the value of x.​

Answer 1

Answer:

44

Step-by-step explanation:

$mean = \frac{12 + x + 5 + 7 + 13}{9}$

$9 = \frac{37 + x}{9}$

$37 + x = 81$

$x = 81 - 37$

$x = 44$

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Answer 2

Step-by-step explanation:

Formula for finding mean-

sum of all numbers/ no. of numbers

therefore,

12+x+5+7+13/5 = 9

= 37 + x/5 = 9

transferring 9 to the other side,

37+x = 9*5

37+x = 45

x= 45-37

x=8

hope it helps