b) Ahmed has 8 chocolates left in a box. The chocs are either hard or soft. (i) Ahmed picks a choc at random. If the probability of picking a soft-centred choc is 3/8, what is the probability he picks a hard centre? (ii) (iii) Ahmed picks a hard centre and is disappointed. He puts it back without eating it and picks another chocolate. What is the probability he chooses a soft centre now? Assume that Ahmed has already taken one soft-centred choc. What is the probability that he picks another soft-centred choc?

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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b) Ahmed has 8 chocolates left in a box. The chocs are either hard or soft.
(i)
Ahmed picks a choc at random. If the probability of picking a
soft-centred choc is 3/8, what is the probability he picks a hard
centre?
(ii)
(iii)
Ahmed picks a hard centre and is disappointed. He puts it back
without eating it and picks another chocolate. What is the
probability he chooses a soft centre now?
Assume that Ahmed has already taken one soft-centred choc.
What is the probability that he picks another soft-centred choc?
Transcribed Image Text:b) Ahmed has 8 chocolates left in a box. The chocs are either hard or soft. (i) Ahmed picks a choc at random. If the probability of picking a soft-centred choc is 3/8, what is the probability he picks a hard centre? (ii) (iii) Ahmed picks a hard centre and is disappointed. He puts it back without eating it and picks another chocolate. What is the probability he chooses a soft centre now? Assume that Ahmed has already taken one soft-centred choc. What is the probability that he picks another soft-centred choc?
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