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题库 / Prep2007E2-DS-151
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.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
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at least 30，至少30登录 或 注册 后可以参加讨论
0 可以作为被除数，不能作为除数。关键在于题目要求是正整数，而 0 不是正整数~登录 或 注册 后可以参加讨论