Ninety students will graduate from Lima Shawnee High School this Spring. Of the

Question

Ninety students will graduate from Lima Shawnee High School this Spring. Of the 90 students, 50 are planning to attend college. Two students are to be picked up at random to carry flags at the graduation.
a. What is the probability both of the selected students plan to attend college?
b. What is the probability one of the two selected students plans to attend college?

My answer for a is 50-2/90 or 48/90 53.3%
My answer for b is 50/90 or 55.5% Are my answers right if not please explain in detail how to get to the answer. Thanks.

Explanation / Answer

a)The probability of the first is 50/90 The probability of the second given the first will attend 49/89 Both 50/90 *49/89= 30.6% b) Probability is 1- the chance that neither will attend Probability that first will not 40/90 Probability that the second will not given the first 39/89 Both 40/90 *39/89= 19.5 so 1-19.5= 80.5%

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