Question: 20 Students - Question I

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Comment on 20 Students - Question I

Was trying to solve this

deepak manohar - October 23, 2017

Was trying to solve this using probability. But not coming to a conclusion. Can we solve this using probability?

I don't see an easy way to

greenlight-admin - October 24, 2017

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

tmtania777 - September 30, 2019

wait how is the science major added in this

The areas in the

greenlight-admin - September 30, 2019

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,

Natashaoverton - March 28, 2021

The faulty thinking was that, you can only include tennis and sophmores not science majors however, the question clearly states or and not and. This was helpful.

Hey Brent a 17 seconds of the video u say here are the spohmores and u include the intersection as well but if u just want sopherems would the be just 4 like i have issues in counting in venn diagrmas as the intersection make it jumbled up.....canu tell me how to count in venn?

At 0:17, I circle all of 10

greenlight-admin - November 15, 2022

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.

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