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25% of all college students major in STEM (Science, Technology, Engineering, and Math). If 33 college students are randomly selected, find the probability that a. Exactly 9 of them major in STEM. b. A...

25% of all college students major in STEM (Science, Technology, Engineering, and Math). If 33 college students are randomly selected, find the probability that a. Exactly 9 of them major in STEM. b. At most 10 of them major in STEM. c. At least 7 of them major in STEM. d. Between 5 and 10 (including 5 and 10) of them major in STEM.

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Answer #1

An s n= 33 3 3-9 Ca (0.25) (O,75 0. 14462 5)33-х 10.8189키 23 33-7 ブ e, (0、25)ス 1035 33-х 0.91 0581-0.6 24 6.05861=(0.960.36)

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Answer #2

25% of all college students major in STEM (Science, Technology, Engineering, and Math). If 43 college students are randomly selected, find the probability that

a. Exactly 12 of them major in STEM. 
b. At most 11 of them major in STEM. 
c. At least 11 of them major in STEM. 
d. Between 7 and 14 (including 7 and 14) of them major in STEM. 

source: Discrete Probability and the Binomial Distribution
answered by: G
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