What is the best approximation of a 15% tip on a $38 car wash?
2 answers:
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Answer:
99.27% probability that among 6 randomly selected graduates, at least one finds a job in his or her chosen field within a year of graduating.
Step-by-step explanation:
For each student, there are only two possible outcomes. Either they find a job in their chosen field within one year of graduating, or they do not. The probability of a student finding a job in their chosen field within one year of graduating is independent of other students. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
56% of the school's graduates find a job in their chosen field within a year after graduation.
This means that
Find the probability that among 6 randomly selected graduates, at least one finds a job in his or her chosen field within a year of graduating.
This is when n = 6.
Either none find a job, or at least one does. The sum of the probabilities of these events is decimal 1. So
In which
99.27% probability that among 6 randomly selected graduates, at least one finds a job in his or her chosen field within a year of graduating.