Question

If the mean of three observations x + 2, x + 4, and x + 6 is 15, then x is equal to
a) 12
(b) 13
(c) 15
(d) 11
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Answer 1

Answer:

x+2+x+4+x+6/3=15

3x+12=15x3

3x+12=45

3x=45-12

3x=33

x=33/3

x=11

hope it helps u

Answer 2

Answer:

D

Explanation

3x+12 divided by 3 multiple by 15