SOLUTION: A room has 3 lightbulbs. Each one has a 10% probability of burning out within the month. What is the probability that all 3 will be lit at the end of the month?
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Question 881880: A room has 3 lightbulbs. Each one has a 10% probability of burning out within the month. What is the probability that all 3 will be lit at the end of the month? Answer by jim_thompson5910(35256) (Show Source):
You can put this solution on YOUR website! 10% probability of burning out within a month
100-10 = 90% chance of not burning out within a month
90% = 0.9
(0.9)*(0.9)*(0.9) = (0.9)^3 = 0.729 = 72.9%
The probability that all 3 stay lit at the end of the month is 72.9%
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