The probability of a student taking a math class or a physics class is [tex]0.85[/tex] when the probability of a student taking a math class is [tex]0.70[/tex], the probability of taking a physics class is [tex]0.30[/tex], and the probability of taking a math class and a physics class is [tex]0.15[/tex]
How can we find the probability of taking math class or a physics class ?
Given in the question probability of the student taking class
[tex]p(M)=0.70\\p(P)=0.30\\p( M and P)=0.15[/tex]
So we use the probability union intersection formula
[tex]p(M or P)=p(M)+p(P)-p(M and P)[/tex]
Substitute the values
[tex]p(M or P)=0.7+0.3-0.15\\=0.85[/tex]
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