统计学 概率Many public schools are implementing a “no-pass,no-play” rule for athletes.Under the system,a student who fails a courseis disqualified from participating in extracurricular activities during the next grading period.Suppose that t

统计学 概率Many public schools are implementing a “no-pass,no-play” rule for athletes.Under the system,a student who fails a courseis disqualified from participating in extracurricular activities during the next grading period.Suppose that t
统计学 概率
Many public schools are implementing a “no-pass,no-play” rule for athletes.Under the system,a student who fails a course
is disqualified from participating in extracurricular activities during the next grading period.Suppose that the probability is
0.20 that an athlete who has not previously been disqualified will be disqualified next term.For athletes who have been
previously disqualified,the probability of disqualification next term is 0.45.Suppose 25% of the athletes have been
disqualified in previous terms.
a) What is the probability that a randomly selected athlete will be disqualified during the next grading period?
b) The basketball team consists of 12 players including 5 who have been previously disqualified.What is the probability
that no more than one of the players will be disqualified next term?

统计学 概率Many public schools are implementing a “no-pass,no-play” rule for athletes.Under the system,a student who fails a courseis disqualified from participating in extracurricular activities during the next grading period.Suppose that t
许多公立学校实行的是“不绕道,不玩的运动员”规则.在此制度下,学生谁失败课程
即丧失参加课外活动,在未来分级时期.假设的概率是
0.20,一个谁也未曾被取消资格将被取消下一届的运动员.对于谁已运动员
以前取消资格,取消资格的概率下一届是0.45.假设25％的运动员已
在以前的资格条件.
1）什么是一个随机选择的运动员将在下一阶段资格等级概率是多少?
二）篮球队的12名球员,包括5谁此前已丧失组成.什么是概率
没有以上的球员之一将被取消下一届?
自己能解了吗

许多公立学校对运动员实行的是“no-pass,np-athletes”规则。在此制度下，学生课程不及格，在未来分级时期，即丧失参加课外活动。假设的概率是
0.20，一个未曾被取消资格下一届将被取消资格的运动员。对于一个以前被取消资格的运动员 ，下一届被取消资格的概率是0.45。假设25％的运动员已
被取消资格，
a）一个随机选择的运动员将在下一学期被取消资格的概率是多...

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许多公立学校对运动员实行的是“no-pass,np-athletes”规则。在此制度下，学生课程不及格，在未来分级时期，即丧失参加课外活动。假设的概率是
0.20，一个未曾被取消资格下一届将被取消资格的运动员。对于一个以前被取消资格的运动员 ，下一届被取消资格的概率是0.45。假设25％的运动员已
被取消资格，
a）一个随机选择的运动员将在下一学期被取消资格的概率是多少？
b）篮球队的12名球员，包括5个此前已取消资格的。那么，这些人中不超过几个会在下学期将被取消资格。

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