A census was conducted at a school. All of the students were asked how many cars their family owns. The results are below. Number of Cars 1 2 3 4 Probability 0.005 0.120 0.125 0.500 0.250 For the questions below enter the value only. Round to the nearest nundredth, if necessary. 1. What is the probability that a randomly chosen student has 4 cars? 2. What is the probability that a randomly chosen student has less than

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter6: Ratio, Proportion, And Probability
Section6.7: Probability And Odds
Problem 2C
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A census was conducted at a school. All of the students were asked
how many cars their family owns. The results are below.
Number of Cars 0
1
2
3
4
Probability
0.005 0.120 0.125 0.500 0.250
For the questions below enter the value only. Round to the nearest
hundredth, if necessary.
1. What is the probability that a randomly chosen student has 4 cars?
2. What is the probability that a randomly chosen student has less than
2 cars?
3. What is the probability that a randomly chosen student has at least 3
cars?
4. What is the expected number of cars?
5. What is the standard deviation?
Transcribed Image Text:A census was conducted at a school. All of the students were asked how many cars their family owns. The results are below. Number of Cars 0 1 2 3 4 Probability 0.005 0.120 0.125 0.500 0.250 For the questions below enter the value only. Round to the nearest hundredth, if necessary. 1. What is the probability that a randomly chosen student has 4 cars? 2. What is the probability that a randomly chosen student has less than 2 cars? 3. What is the probability that a randomly chosen student has at least 3 cars? 4. What is the expected number of cars? 5. What is the standard deviation?
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