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Mathematics
Probability
Birth Statistics
If two people are selected at random, what is the probability that they were both born in May?
1 answer
1/12 * 1/12 = ?
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If two people are selected at random, what is the probability that they were both born in December?
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The probability that two people were both born in December is very low, since December is only one
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If two people are selected at random, what is the probability that they were both born in winter (December, January, or
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3/12 * 3/12 = ?
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300 hundred people apply for three jobs. 120 of the applicants are women.
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(a) (120/300) (119/299) (180/298) = ? Use similar method for remaining problems.
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Three hundred people apply for three jobs. 80 of the applicants are women If three persons are selected at random, what is the
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prob(woman) = 80/300 = 2/75 prob(not woman) = 73/75 prob(1 women of 3) = C(3,1) (2/75)(73/75)^2 =
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Suppose 20% of babies born are born early, 50% are born on time, and 30% are born late. A nurse uses a random-number table to
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Answers: 1. B. The fraction is 2 over 5. 2. C. 60 3. C. 220 4. B. 6!; 720 5. B. start fraction 2
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Suppose 20% of babies born are born early, 50% are born on time, and 30% are born late. A nurse uses a random-number table to
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To find the probability of at least 1 baby being born early, we need to find the probability of none
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Suppose 20% of babies born are born early, 50% are born on time, and 30% are born late. A nurse uses a random-number table to
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Yes, A.
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Suppose 20% of babies born are born early, 50% are born on time, and 30% are born late. A nurse uses a random-number table to
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To use the random-number table, we can look at each digit separately and see what it represents. For
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Four hundred people apply for three jobs. 130 of the applicants are women.
(a) If three persons are selected at random, what is
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Your school subject is NOT college.
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Suppose 20% of babies are born early, 50% are born on time, and 30% are born late. A nurse uses a random-number table to find
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so add up the points for success, and divide by the total # points
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