30 exceeds three times a number by 89 what is the number
1 answer:
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Answer:
0.2528 = 25.28% probability of selling no more than 2 properties in one week.
Step-by-step explanation:
For each property, there are only two possible outcomes. Either they are sold, or they are not. The chance of selling any one property is independent of selling another property, which means that the binomial probability distribution is used 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.
A real estate agent has 12 properties that she shows.
This means that
She feels that there is a 30% chance of selling any one property during a week.
This means that
Compute the probability of selling no more than 2 properties in one week.
2 or less sold, which is:
In which
Then
0.2528 = 25.28% probability of selling no more than 2 properties in one week.