Pr[X is female or X is maths major or x is female and maths major]
=Pr[X is female or X is maths major]
=Pr[X is female] + Pr[X is maths major] - Pr[X is female and maths major]
=25/50 + 15/50 - 10/50
=30/50
How would I find the answer to...
In a class with 50 students, 25 of the students are female, 15 of the sudents are mathematics majors, and 10 of the mathematics majors are female. If a student in the class is to be selected at random, what is the probability that the student selected will be female or a mathematics major or both?
Hello, dnntau!
In a class with 50 students, 25 of the students are female,
15 of the students are math majors, and 10 of the math majors are female.
If a student in the class is to be selected at random, what is the probability
that the student selected will be female or a mathematics major or both?
You can draw a Venn diagram or put the data into a chart . . .
. .
Fill in the empty cells and answer the question.