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Wiley_quiz_Ch._4

# Wiley_quiz_Ch._4 - MC33 Let A be the event that a student...

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MC33 Let A be the event that a student is enrolled in an accounting course, and let S be the event that a student is enrolled in a statistics course. It is known that 30% of all students are enrolled in an accounting course and 40% of all students are enrolled in statistics. Included in these numbers are 15% who are enrolled in both statistics and accounting. A student is randomly selected, what is the probability that the student is enrolled in either accounting or statistics or both?' :4 f or!. ;(~ ~~ 0.90 .=:~Cx)~V(y ~tJ(xnYJ .-" MC 38 c/~ - \ -- (.)-10 - tl l'S Max Sandlin is exploring the characteristics of stock market investors. He found that sixty = e c::, .... r percent of all investors have a net worth exceeding \$1,000,000; 20% of all investors use an online brokerage; and 10% of all investors a have net worth exceeding \$1,000,000 and use an online brokerage. An investor is selected randomly, and E is the event "net worth exceeds \$1,000,000" and 0 is the event "uses an online brokerage." P(O u E) = ------ 0.15 0.50 .co -?c o~04 0 010 (En 0.; PC D)-t \?tE - p[EnD j o~+o0-td 0'6 -0\ := 0'10 0.80 0.17 MC39 Max Sandlin is exploring the characteristics of stock market investors. He found that sixty percent of all investors have a net worth exceeding \$1,000,000; 20% of all investors use an online brokerage; and 10% of all investors a have net worth exceeding \$1,000,000 and use an online brokerage. An investor is selected randomly, and E is the event "net worth exceeds \$1, 000, 000," and 0 is the event "uses an online brokerage." P(OIE) = _ Ie; '-_.

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