72% of all students at a college still need to take another math class. If 34 students are randomly selected, find the probability thatExactly 23 of them need to take another math class. At most 23 of them need to take another math class. At least 22 of them need to take another math class. Between 21 and 25 (including 21 and 25) of them need to take another math class

Question

72% of all students at a college still need to take another math class. If 34 students are randomly selected, find the probability that

Exactly 23 of them need to take another math class. 
At most 23 of them need to take another math class. 
At least 22 of them need to take another math class. 
Between 21 and 25 (including 21 and 25) of them need to take another math class

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