harleeGirl
23.02.2021 •
Mathematics
If the bisectors of angles of a quadrilateral enclose a rectangle, then show that it is a parallelogram.
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Ответ:
0.1373 = 13.73% probability that the lines are occupied for exactly 5 calls
Step-by-step explanation:
For each call, there are only two possible outcomes. Either the lines are occupied, or they are not. The events that the lines are occupied on successive calls are independent. This means that 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.
The phone lines to an airline reservation system are occupied 61% of the time.
This means that
If 11 calls are placed, what is the probability that the lines are occupied for exactly 5 calls
This is P(X = 5) when n = 11. So
0.1373 = 13.73% probability that the lines are occupied for exactly 5 calls