document.write( "Question 379163: In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that:
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Algebra.Com's Answer #269544 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "Note: The probability of x successes in n trials is: 
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document.write( "P = nCx*  where p and q are the probabilities of success and failure respectively. 
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document.write( "In this case p = .10 and q = .90
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document.write( "P(exactly 2 out of 14 will have side effects):
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document.write( "P = 14C2 (.10)^2(.90)^12 = 81 *(.10)^2(.9)^12 = .257\r
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document.write( "P(at least three  will have side effects):
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document.write( "P = 1 - P(none) - P(one) - P(two) = 1- (.9)^14 - 17*(.1)^1(.9)^13 - 136*(.1)^2(.9)^12
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document.write( "P = 1 -.2288 - .3559 - .2570 = .1584 \n" );
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