What is the probability that a student is 14-15 or has tried marijuana at least once a. 0.47 b. 0.43 c. 0.30 d. 0.53
What is the probability that a student is 14-15 or has tried marijuana at least once a. 0.47 b. 0.43 c. 0.30 d. 0.53
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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Question
Table 1 below summarizes the students’ response to whether they have tried marijuana at least once in their lifetime.
| Tried marijuana at least once | |||
| Age | Yes | No | Total |
| 12-13 | 4 | 33 | 37 |
| 14-15 | 7 | 23 | 30 |
| 16-17 | 9 | 24 | 33 |
| Total | 20 | 80 | 100 |
What is the
a.
0.47
b.
0.43
c.
0.30
d.
0.53
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