64% of all students at a college still need to take another math class. If 4 students are randomly selected, find the probability that a. Exactly 2 of them need to take another math class.  b. At most 2 of them need to take another math class.  c. At least 2 of them need to take another math class.  d. Between 2 and 3 (including 2 and 3) of them need to take another math class.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.8: Probabilities Of Disjoint And Overlapping Events
Problem 2C
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64% of all students at a college still need to take another math class. If 4 students are randomly selected, find the probability that

a. Exactly 2 of them need to take another math class. 
b. At most 2 of them need to take another math class. 
c. At least 2 of them need to take another math class. 
d. Between 2 and 3 (including 2 and 3) of them need to take another math class. 

 

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