What is the probability that the person visited the gift shop, given that the person did not watch the film?

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2 Answers
Jim H
Mar 27, 2017

19.6%

Explanation:

G = visited the giftshop

~F = did not watch the film

We've been asked for P(G| ~F)

P(G| ~F) = (P(G nn ~F))/(P( ~F)

= 0.10/0.51 + 10/51 ~~ 0.196 = 19.6%

Steve M
Mar 27, 2017

P("visited gift shop" | "did not watch the film") = 19.6 %

Explanation:

By the definition of conditional probability we have:

P("visited gift shop" | "did not watch the film")
" " = (P("visited gift shop" nn "did not watch the film")) / (P("did not watch the film"))
" " = 0.1 / 0.51
" " = 0.1960784 ...
" " = 19.6 %

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