The average of three numbers is 12. If two of the numbers is 13 and 15.
then which is the third number?
(A) 6 (B) 8
(C) 16 (D) 20
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Answer:
(B) 8
Step-by-step explanation:
(13+15+x)/3 = 12
28+x=12*3
28×x=36
x=36-28
x=8
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