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PilotLPTM [1.2K]
4 years ago
15

Lisa bought a box of 25 aa batteries at a garage sale. her "loving" husband tested the batteries and tells her that 10 of them a

re bad (of course he mixed the bad batteries back in with the good). if lisa were to randomly select 4 batteries for her calculator, what if the probability that all 4 are bad?
Mathematics
1 answer:
katrin [286]4 years ago
7 0
Probability to get an bad battery
=10/25
=2/5
Probability that all 4 are bad
=2/5×2/5×2/5×2/5
=16/625
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