A certain meter records voltage between 0 volts and 10 volts, inclusive. If the average (arithmatic) value of 3 recording on the meter was 8 volts, what was the smallest possible recording, in volts?
A.2
B.3
C.4
D.5
E.6
请求nn帮忙,我一点思路都没有,不知道这题在说什么。。。谢谢! |