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27% of all college students major in STEM (Science, Technology, Engineering, and Math). If 31 college...

27% of all college students major in STEM (Science, Technology, Engineering, and Math). If 31 college students are randomly selected, find the probability that

a. Exactly 9 of them major in STEM.
b. At most 8 of them major in STEM.
c. At least 8 of them major in STEM.
d. Between 5 and 11 (including 5 and 11) of them major in STEM

Math   Statistics-And-Probability   
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