Can you give me an equation to solve: Determine the differences between college

Question

Can you give me an equation to solve: Determine the differences between college students admittedthrough high ACT tests scores and students admitted through regularadmission. 94% of students admitted through high ACT scoresgraduated. If 10 of these high scoring students are randomlyselected, what it the probability that at least 9 graduated. Can you give me an equation to solve: Determine the differences between college students admittedthrough high ACT tests scores and students admitted through regularadmission. 94% of students admitted through high ACT scoresgraduated. If 10 of these high scoring students are randomlyselected, what it the probability that at least 9 graduated.

Explanation / Answer

I wasn't sure which part you were not grasping, please be specific.I can guess you are not familiar with 10C9and 10C10. They are called combinations. Forexample, if you are given 9 black marbles and 1 white marble, howmany combinations you can have to arrange them in a line. Yourintuition will tell you there are 10 of them.nCk is defined as n!/[k!(n-k)!]10C9 is then equal to 10.10C10 is equal to 1. This random variable of number of students with high ACT scoresgraduated follows a binomial distribution. Please read more aboutbinomial distribution, you will understand how that comes from. Hope this helps.

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