P2-DS-151

[sunnyblue13s]

151. 15486-!-item-!-187;#058&010743
Is the average (arithmetic mean) of 5 different positive integers at least 30 ?

(1) Each of the integers is a multiple of 10.

(2) The sum of the 5 integers is 160.

(D)?????

我覺得是(B)ㄟ~~

[Huang Hsin-Yi]

(1)最小數10,20,30,40,50 平均30....所以充份

[sunnyblue13s]

感謝感謝~~沒注意到 "at least"