the mean of abc is 16 , find the mean of :
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Answer:
a. 21
b. 23
c. 47
Step-by-step explanation:
(a+b+c)/3 = 16
so,. ( (a+5) + (b+5) + (c+5) )/3 = (a+b+c)/3 + 5 = 21
( (a-7) + (b+11) + (c+17) )/3 = (a+b+c)/3 + 7 = 23
( (3a-1) + (3b-1) + (3c-1) )/3 = 3(a+b+c)/3 -1 = 47
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