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Chapter 12: Q15. (page 801)
Write an expression that describes the area in square units of a triangle with a height of and a base of .
The area of a triangle is square units.
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The homecoming dance committee is trying to decide on a theme. They send out a questionnaire to all of the girls in the school. Identify the sample and suggest a population from which it was selected. Then, classify the type of data collection used.
A local cable provider asked its subscribers how many television sets they had in their homes. The results of their survey are shown in the probability distribution.
Number of televisions | probability |
1 | 0.18 |
2 | 0.36 |
3 | 0.34 |
4 | 0.08 |
0.04 |
If a household is selected at random, what is the probability that it has fewer than 4 televisions?
Evaluate each expression.
The results of a simulation of coin flipping are shown.
Outcome | Frequency |
heads | 25 |
tails | 75 |
What is the experimental probability of heads?
At the mall, 700 of the 2000 people shopping were under the age of 21. What percent of the shoppers were under 21?
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