document.write( "Question 856963: A manufacturer of compact disk players subjects the equipment to a comprehensive testing process for all electrical and mechanical functions before it leaves the factory.Previously data indicate that the probability of equipment passing the test 0.9.if four compact disk players are randomly selected,what is the probability\r
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Algebra.Com's Answer #516265 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "p = .9,  n = 4
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document.write( "P(all four)= (.9)^4 = .6561
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document.write( "P(none) = (.1)^4 = .00009
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document.write( "Using TI
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document.write( "P(at least three) = binompdf(4, .9, 3) + binompdf(4, .9, 4)= .9477
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document.write( "P(x < 2) = (.1)^4 + binompdf(4, .9, 1) = .0037
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