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Recent questions tagged p286

Let A and B be two events.If P(A|B)=P(A),then A is______of B.

asked Jan 10, 2013 by sreemathi.v

0 answers

Let X be a random variable taking values $x_1,x_2,.....,x_n$ with probabilities $p_1,p_2,......,p_n$,respectively.Then var(X)=________.

asked Jan 10, 2013 by sreemathi.v

0 answers

If X follows binomial distribution with parameters n=5,p and P(x=2)=9,P(X=3),then p=__________.

asked Jan 10, 2013 by sreemathi.v

0 answers

If A and B are such that \[P(A'\cup B')=\frac{2}{3} \;and\;P(A\cup B)=\frac{5}{9},\]\[then\;P(A')+P(B')=\text{__________}.\]

asked Jan 10, 2013 by sreemathi.v

1 answer

If A and B are two events such that $P(A|B)=p,P(A)=p,P(B)=\frac{1}{3} \quad$ and $\quad P(A\cup B)= \frac{5}{9},$ then $\; p=\text{_____________}.$?

asked Jan 10, 2013 by sreemathi.v

1 answer

True or False: If A,B and C are three independent events such that P(A)+P(B)=P(C)=p,then\[P(At\;least\;two\;of\;A,B,C\; occur)=3p^2-2p^3\]

asked Jan 10, 2013 by sreemathi.v

1 answer

True or False: If A and B are two events such that P(A)>0 and P(A)+P(B)>1,then\[P(B|A)\geq 1-\frac{p(B')}{P(A)}\]

asked Jan 10, 2013 by sreemathi.v

1 answer

True or False: If A and B are independent,then \[P(exactly\; one\; of \;A,B\; occurs)=P(A)P(B)+P(B)P(A)\]

asked Jan 10, 2013 by sreemathi.v

1 answer

True or False: If A and B are independent events,then $P(A'\cup B)=1-P(A)(B')$

asked Jan 10, 2013 by sreemathi.v

1 answer

True or False: Another name for the mean of a probability distribution is expected value.

asked Jan 10, 2013 by sreemathi.v

1 answer

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