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31% of all college students major in STEM (Science, Technology, Engineering, and Math). If 40 college students are randomly selected, find the probability that a.

31% of all college students major in STEM (Science, Technology, Engineering, and Math). If 40 college students are randomly selected, find the probability that a. Exactly 13 of them major in STEM. b. At most 15 of them major in STEM. c. At least 14 of them major in STEM. d. Between 8 and 14 (including 8 and 14) of them major in STEM.

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