ofmiceandkj1
04.07.2020 •
Mathematics
A student is given a multiple choice exam with 10 questions, each question with ve possible answers and worth of 10 points. He guesses randomly for each question. What is the probability that he will score at least 70
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Ответ:
B
Step-by-step explanation:
t = 20u
r = 5u/2
3rt = 3((20u)(2.5u))
3rt = 3(50u)
3rt = 150u