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Chips suppose a computer chip manufacturer rejects 2% of the chips produced because they fail presale testing.
a.what's the probability that the fifth chip you test is the rst bad one you nd?
b.what's the probability you nd a bad one within the rst 10 you examine?

Respuesta :

(a) P( fifth one is bad)  = P( first 4 are OK) * P(5th is bad)

= (0.98)^4 * 0.02 =  0.0184   or 1.84%

(b)  this will be (0.98)^10 =  81.70%



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