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One bag contains 4 white balls and 2 black balls, another bag contains

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araspai
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One bag contains 4 white balls and 2 black balls, another bag contains [#permalink] New post   09 Oct 2003, 21:11
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One bag contains 4 white balls and 2 black balls, another bag contains 3 white balls and 5 black balls. if one ball is drawn from each bag, determine the probability p that

A. both are white
b. both are black
c. 1 is white and 1 is black
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Praetorian
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Re: One bag contains 4 white balls and 2 black balls, another bag contains [#permalink] New post   Updated on: 14 Oct 2003, 01:05
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araspai wrote:
One bag contains 4 white balls and 2 black balls , another bag contains 3 white balls and 5 black balls . if one ball is drawn from each bag, determine the probability p that
a. both are white
b. both are black
c. 1 is white and 1 is black


a. both are white : 4/6 * 3/8 = 1/4
b. both are black : 2/6 * 5/8 = 5/24
c. 1 is white and 1 is black : 4/6*5/8 + 2/6*3/8 = 26/48 = 13/24

EDIT : c) was edited.

Originally posted by Praetorian on 09 Oct 2003, 22:53.
Last edited by Praetorian on 14 Oct 2003, 01:05, edited 1 time in total.
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stolyar
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Re: One bag contains 4 white balls and 2 black balls, another bag contains [#permalink] New post   Updated on: 14 Oct 2003, 01:56
a. agree
b. agree
c. P=P(BW)+P(WB)=2/6*3/8+4/6*5/8=10/12=13/24

EDIT

Originally posted by stolyar on 14 Oct 2003, 00:58.
Last edited by stolyar on 14 Oct 2003, 01:56, edited 1 time in total.
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Praetorian
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Re: One bag contains 4 white balls and 2 black balls, another bag contains [#permalink] New post   14 Oct 2003, 01:07
stolyar wrote:
a. agree
b. agree
c. P=P(BW)+P(WB)=4/6*5/8+5/8*4/6=10/12=5/6



Quote:
4/6*5/8+5/8*4/6


where you get the bold part from...

i edited my solution...see if its ok.

thanks
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Re: One bag contains 4 white balls and 2 black balls, another bag contains [#permalink] New post   03 Nov 2021, 09:04
A. 4/6 * 3/8 = 12/48 = 1/4 = .25
B. 2/6 * 5/8 = 10/48 = 5/24 = .21
C. (4/6 * 5/8) + (2/6 * 3/8) = 20/48 + 6/48 = 26/48 = 13/24 =.54
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Re: One bag contains 4 white balls and 2 black balls, another bag contains [#permalink] New post   09 Dec 2022, 07:04
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Re: One bag contains 4 white balls and 2 black balls, another bag contains [#permalink]
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