SOLUTION: The probability that a student chosen at random from a class is a girl is 0.3.1f 15 students are chosen at random, find the probability that there will be more than four but less t
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Question 1076931: The probability that a student chosen at random from a class is a girl is 0.3.1f 15 students are chosen at random, find the probability that there will be more than four but less than six girls.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Want 4 and 5 girls
15C4(0.3)^4(0.7)^11=0.2186
15C5(0.3)^5(0.7)^10=0.2061
Total is 0.4247
Expected value is 4.5, so this is reasonable.
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