SOLUTION: tom likes to lie in bed in the morning. the probability that he is late for school is 0.1. What is the possibility that he is late on monday, tuesday & wednesday. What is possibili

Algebra ->  Probability-and-statistics -> SOLUTION: tom likes to lie in bed in the morning. the probability that he is late for school is 0.1. What is the possibility that he is late on monday, tuesday & wednesday. What is possibili      Log On


   



Question 321324: tom likes to lie in bed in the morning. the probability that he is late for school is 0.1. What is the possibility that he is late on monday, tuesday & wednesday. What is possibility that he is late on monday & tuesday but on time on wednsday. What is possibility that he is late on only one of the three mornings?
Answer by stanbon(75887) About Me  (Show Source):
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tom likes to lie in bed in the morning. the probability that he is late for school is 0.1.
What is the possibility that he is late on monday, tuesday & wednesday.
Ans: 0.1^3
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What is possibility that he is late on monday & tuesday but on time on wednsday.
Ans: 0.1^2*0.9
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What is the possibility that he is late on only one of the three mornings?
Ans: P(x=1)= 3C1(0.1)^1(0.9)^2 = 3*0.1*0.81 = 0.2430
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Cheers,
Stan H.