A biased 4-sided die is numbered 1, 3, 5 and 7. The probability of obtaining each score
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A biased 4-sided die is numbered 1, 3, 5 and 7. The probability of obtaining each score is proportional to that score.
a. Find the expected number of times that the die will be rolled, up to and including the roll on which he first non-prime number is obtained.
b. Find the probability that the first prime number is obtained on the third roll of the die.
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Related Book For
Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook
ISBN: 9781108407304
1st Edition
Authors: Dean Chalmers, Julian Gilbey
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