Mathematics, 31.07.2019 20:20, shelbyp2003
Assume that random guesses are made for 15 multiple chioce questions on an sat test and that there are 5 choices on each question with the probability of success 0.20. find the probability that the number of correct answers is at most 6 (this problem meets all the requirements of a binomial situation.)
Answers: 1
![P(X=0)=15_C_0\cdot (0.20)^{0}\cdot (0.80)^{15-0}\\\\i.e.\\\\P(X=1)=1\cdot 1\cdot (0.80)^{15}\\\\i.e.\\\\P(X=1)=0.0351[tex]P(X=1)=15_C_1\cdot (0.20)^{1}\cdot (0.80)^{15-1}\\\\i.e.\\\\P(X=1)=15\cdot (0.20)\cdot (0.80)^{14}\\\\i.e.\\\\P(X=1)=0.1319](/tpl/images/0155/5967/c5406.png)
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Assume that random guesses are made for 15 multiple chioce questions on an sat test and that there a...
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