A circle has a circumference of 361\pi What is the diameter of the circle?
2 answers:
The circumference of a circle is given by:
Where r is radius of the circle .
Now the relation between radius and diameter is given as:
Radius * 2 =Diameter
So replacing 2r by "d" in the equation of circumference,
We are given value of circumference as 361/pi
Plugging this value in the formula for circumference,
Answer: Diameter is given by:
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Answer:
0.2773 = 27.73% probability that at the May celebration, exactly two members of the group have May birthdays
Step-by-step explanation:
For each person, there are only two possible outcomes. Either they have a birthday in May, or they do not. The probability of a person having a birthday in May is independent of any other person. This 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.
Probability of a person being in May:
May has 31 days in a year of 365. So
Group of 20 friends:
This means that
What is the probability that at the May celebration, exactly two members of the group have May birthdays?
This is P(X = 2).
0.2773 = 27.73% probability that at the May celebration, exactly two members of the group have May birthdays