SOLUTION: On a field trip, 4 students bring bag lunches. On the way there, the bag lunches get mixed up. What is the probability that exactly 1 student gets his or her own bag lunch back?

Algebra ->  Probability-and-statistics -> SOLUTION: On a field trip, 4 students bring bag lunches. On the way there, the bag lunches get mixed up. What is the probability that exactly 1 student gets his or her own bag lunch back?      Log On


   

Question 573887: On a field trip, 4 students bring bag lunches. On the way there, the bag lunches get mixed up. What is the probability that exactly 1 student gets his or her own bag lunch back?
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


The probability of successes in trials where is the probability of success on any given trial is given by:



Where is the number of combinations of things taken at a time and is calculated by

For your situation, and . Plug in the numbers and do the arithmetic.

John

My calculator said it, I believe it, that settles it
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