The average(arithmetic mean)of c and d is 12, and the average of c, d, and e is

游客2025-02-24 14

问题 The average(arithmetic mean)of c and d is 12, and the average of c, d, and e is What is the value of e?

选项 A、6
B、10
C、12
D、18
E、20

答案 A

解析 The correct answer is A. First, set up equations to represent the given averages:

Next, simplify the first equation: c+d=24
Now, substitute this value into the second equation and solve for e:

24 + e = 30
e = 6

转载请注明原文地址:https://www.tihaiku.com/zcyy/3970647.html

相关试题推荐

随机试题

最新回复(0)

Theaverage(arithmeticmean)ofcanddis12,andtheaverageofc,d,andeis