问题标题:
【Q1:WhatistheprobabilitythateventEoreventForbothwilloccur?(1)TheprobabilitythateventEwilloccuris0.6.(2)TheprobabilitythateventFwilloccuris0.4.A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.】
问题描述:

Q1:

WhatistheprobabilitythateventEoreventForbothwilloccur?

(1)TheprobabilitythateventEwilloccuris0.6.

(2)TheprobabilitythateventFwilloccuris0.4.

A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.

B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.

C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.

D.EACHstatementALONEissufficient.

E.Statements(1)and(2)TOGETHERareNOTsufficient

Q2:

Lastyearinagroupof30businesses,21reportedanetprofitand15hadinvestmentsinforeignmarkets.Howmanyofthebusinessesdidnotreportanetprofitnorinvestinforeignmarketslastyear?

(1)Lastyear12ofthe30businessesreportedanetprofitandhadinvestmentsinforeignmarkets.

(2)Lastyear24ofthe30businessesreportedanetprofitorinvestedinforeignmarkets,orboth.

A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.

B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.

C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.

D.EACHstatementALONEissufficient.

E.Statements(1)and(2)TOGETHERareNOTsufficient.

第一题答案为E,第二题答案为D.

第一题为什么不选C我觉得应该是0.4+0.6+0.4*0.6

刘成山回答:
  Q1:概率-互斥事件与独立事件theprobabilitythateventEoreventForbothwilloccur实质上就是问P(E∪F)的值 Statement(1):InsufficientStatement(2)...
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《【Q1:WhatistheprobabilitythateventEoreventForbothwilloccur?(1)TheprobabilitythateventEwilloccuris0.6.(2)TheprobabilitythateventFwilloccuris0.4.A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.】|小学数学问答-字典翻译问答网》
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