mandilynn22
26.06.2019 •
Mathematics
Astudent randomly guesses on 10 true/false questions. use the binomial model to determine the probability that the student gets 5 out of 10 questions right. show all your steps.
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Ответ:
0.2461
Step-by-step explanation:
The binomial distribution model formula is
Where
P(x) is the probabilityn is the is total number of questions (here n = 10)x is the the number of questions we are looking for (we are looking for 5 out of 10 to be right, so x = 5)p is the probability of success (here we want 5 questions right, so probability of being right in true of false question is )q is the probability of failure (here it means getting the answer wrong, so probability of wrong is )Now, we plug-in all the info into the formula and figure out the "probability that the student gets 5 out of 10 questions right":
Ответ:
answer- peaceful purchases, quality plus and better buy