Mathematics, 27.07.2019 10:30 xxaurorabluexx
Someone i failed this on plato 10 times i need the correct answer round your answers to the nearest thousandth. the probability that sandra gets a ride to work on any morning is 0.7. the probability that she gets a ride 3 times in a 5-day work week and the probability that she gets a ride at least 2 times in a 5-day workweek
Answers: 1
![1-[P(X=0)\text{ or }P(X=1)] \\ \\=1-(_5C_0(0.7)^0(1-0.7)^{5-0}+_5C_1(0.7)^1(1-0.7)^{5-1}) \\ \\=1-(\frac{5!}{0!5!}(0.7)^0(0.3)^5+\frac{5!}{1!4!}(0.7)^1(0.3)^4) \\ \\=1-(0.00243+0.02835)=1-0.03078=0.96922\approx0.969](/tpl/images/0138/4531/12907.png)
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