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!
某种仪表可以测0-10伏的电压(包括0和10),如果3次记录的平均值是8,问最小可能电压是多少?
那就使得另两次最大,取10伏,所以最小可能电压=8*3-10-10=4
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