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Comment on 20 Students - Question I
Was trying to solve this
I don't see an easy way to
I don't see an easy way to apply probability rules here. Simple counting is, by far, the best approach.
Cheers,
Brent
wait how is the science major
The areas in the
The areas in the intersections show students who fall into 2 or more of the categories. So, for example, there are 6 students who play tennis AND are science majors.
Since 6 students play tennis, they must be included in the list of students who are sophomores or tennis players (or both)
Does that help?
Cheers,
Brent
The faulty thinking was that,
Hey Brent a 17 seconds of the
At 0:17, I circle all of 10
At 0:17, I circle all of 10 sophomores.
Yes, some of those sophomores play tennis, some are Science majors, and some are all three, BUT the important thing to remember here is that all 10 of them are, indeed, sophomores.
So, a sophomore who plays tennis and is also as science major is still included among sophomores.