Find probability bulb will still be working after one week

Reference no: EM13133586

A bin contains 25 lightbulbs, 5 of which are in good condition and will function for at least thirty days, 10 of which are partially defective and will fail in their second day of use, and 10 of which are totally defective and will not light up. Given that a randomly chosen bulb initially lights, what is the probability it will still be working after one week?

Reference no: EM13133586

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