SOLUTION: Suppose that 85% of graduating students attend their graduation ceremony. A group of 15 students is randomly chosen. What is the probability that at least 12 students from the samp

Question 1074651: Suppose that 85% of graduating students attend their graduation ceremony. A group of 15 students is randomly chosen. What is the probability that at least 12 students from the sample attend graduation
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
At least 12 includes 12,13,14,15
for 12
15C12.85^12*.15^3=0.2184
15C13.85^13*.15^2=0.2856
15C14^.85^14*.15=0.2312
15C15.85^15=0.0874
Sum is 0.8226
probability at least 12 attend is 0.823.
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