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In a bag, there are 5 cards numbered 1 to 5. Each time a card is randomly selected, it I'd replaced in the bag. What is the probability Marsha will select an even-numbered card first and then an odd-numbered
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Dec 16, 2016
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In a bag, there are 5 cards numbered 1 to 5. Each time a card is randomly selected, it I'd replaced in the bag. What is the probability Marsha will select an even-numbered card first and then an odd-numbered card?
Mathematics
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there is a 2 out of 5 chance of pulling an even
there is a 3 out of 5 chance of pulling an odd the second time
*
=
there is a 6 out of 25 chance of it happening in that order
Alexander Knyazev
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Dec 19, 2016
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Alexander Knyazev
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Out of 5 cards in the bag ...
-- There are 2 even numbers . . . 2 and 4 .
-- There are 3 odd numbers . . . 1, 3, and 5 .
So EITHER time, the probability of pulling an even number is 2/5 ,
and the probability of pulling an odd number is 3/5 .
The probability of pulling an even number the first time
AND an odd number the second time is
(2/5) x (3/5) = 6/25 =
24%
.
Holli
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Dec 22, 2016
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Holli
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