problemset20

problemset20 - STAT/MA 416 October 14, 2011 Problem Set 20...

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STAT/MA 416 October 14, 2011 Problem Set 20 Name: 1. Rock Block. On a certain radio station, 70% of the songs are rock songs, and 30% of the songs are pop songs. The songs are selected independently. Each “block” of songs (a “block” is a set of songs between commercials) contains 10 songs. The DJ says that the next “block” of songs has at least 8 rock songs. Given this information, what is the probability that all 10 songs in that “block” will be rock songs? 1
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A pizza place offers the choice of the following toppings: extra cheese, mushrooms, pepperoni, ham, sausage, onions, and green peppers. Assume that order of toppings is irrelevant. Also assume that toppings cannot be reused (e.g., no double sausage is allowed). a. How many 3-topping pizzas are possible? b. If I randomly order a 3-topping pizza, what is the probability that sausage is a topping? c. If I randomly order a 3-topping pizza, what is the probability that sausage and pepperoni are toppings? 2
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problemset20 - STAT/MA 416 October 14, 2011 Problem Set 20...

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