PP-T2-PS 103

[Samantha23]

A certain meter records voltage between 0 volts and 10 volts, inclusive. If the average (arithmetic mean) value of 3 recordings on the meter was 8 volts, what was the smallest possible recording, in volts?

(A)2
(B)3
(C)4
(D)5
(E)6

[vantreal]

total: 8x3=24

取最小的話, 另外兩個都要是最大的.
24-10-10=4

Ans: (C)