document.write( "Question 1165643: Suppose an opaque jar contains 3 red marbles and 10 green marbles. The following exercise refers to the experiment of picking two marbles from the jar without replacing the first one.\r
\n" ); document.write( "\n" ); document.write( "What is the probability of getting a green marble and a red marble?
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Algebra.Com's Answer #790119 by greenestamps(13200)\"\" \"About 
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\n" ); document.write( "(1) by an elementary method....

\n" ); document.write( "P(red then green) = \"%283%2F13%29%2A%2810%2F12%29+=+30%2F156+=+5%2F26\"
\n" ); document.write( "P(green then red) = \"%2810%2F13%29%2A%283%2F12%29+=+30%2F156+=+5%2F26\"
\n" ); document.write( "P(one red and one green) = \"5%2F26%2B5%2F26+=+5%2F13\"

\n" ); document.write( "(2) By a more sophisticated method (that might be required for more complicated, problems, for which the elementary method above would be cumbersome)....

\n" ); document.write( "P(choose 1 red and 1 green from 3 red and 10 green) = (number of ways of choosing 1 of 3 reds and 1 of 10 greens) divided by (number of ways of choosing any 2 of the 13 marbles)

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