What is the probability that a student who does not like watching television also does not like reading? (See document)

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Answer 1 · 2018-05-09T20:55:42

#66.67%#, or #2/3#

Because we are just looking at students that dislike watching TV, we can ignore everyone else for the purposes of this problem.

#30# students dislike watching TV, #10# of those like reading and #20# do not.

We can set these up as fractions:

#(10 " like reading")/(30 " total") = 1/3#

#(20 " do not like reading")/(30 " total") = 2/3#

So, if you have a student that does not like watching TV, there is a #2/3# chance that that student will not like reading either.