VJesus12 wrote:If the average of p and 4p is 10, then p =
(A) 1
(B) 3
(C) 4
(D) 10
(E) 18
SUM/COUNT = AVERAGE
In the problem above:
Sum = p + 4p.
Count = 2.
Average = 10.
Plugging these values into the equation in blue, we get:
(4p + p)/2 = 10
5p = 20
p = 4.
The correct answer is
C.
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