document.write( "Question 1174299: a box contains 10 marbles 7 of which are black and 3 are red . if 3 marbles is drawn at random without replacement find the probability of choosing (a) ome red one black and one red in that order (b) at least two black marbles (c) at most two black marbles
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Algebra.Com's Answer #799723 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi\r\n" );
document.write( "  10 marbles:  7B and 3R\r\n" );
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document.write( "if 3 marbles is drawn at random without replacement: \r\n" );
document.write( "find the probability of choosing \r\n" );
document.write( "(a) one red, one black and one red in that order: (3/10)(7/9)(2/8)\r\n" );
document.write( "(b) at least two black marbles   \r\n" );
document.write( "1 - No black marbles = 1-binomcdf(3, .7, 0) = 1 - .027   = .973\r\n" );
document.write( "(c) at most two black marbles   binomcdf(3, .7, 2) = .657\r\n" );
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document.write( "Wish You the Best in your Studies.\r\n" );
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