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A box contains 8 green balls and 5 red balls. Find the probabilities of picking exactly 3 green balls with replacement and without replacement.
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- with replacement:
8c1/13c1*8c1/13c1*8c1/13c1=8*8*8/13*13*13
without replacement:
8c1/13c1*7c1/12c1*6c1/11c1=8*7*6/13*12*11
in this case total number of balls also reduced.
- 9 years agoHelpfull: Yes(6) No(0)
- with replacement,
p(3 green balls) = 8c3/13c3,
with out replacement,
p(3 green balls) = 8c1*7c1*6c1/13c3 - 9 years agoHelpfull: Yes(4) No(1)
- 8C3/13C3=ANS
- 9 years agoHelpfull: Yes(0) No(1)
- with replacement 8/13 *18/13*18/13
Without replacement 8/13 *7/12*6/11 - 9 years agoHelpfull: Yes(0) No(0)
- by without replacing 8C1/13C1 * 7C1/12C1 *6C1/11c1 = 28/143
- 9 years agoHelpfull: Yes(0) No(0)
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