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Forty percent of students study more than 4h for their final math exam. Twenty percent of students fail the exam. If studying more than 4h and failing the exam are independent events, what percent of those who study more than 4h for the exam fail it? O 15% O 10% O 8% 0 4.5%

Forty percent of students study more than 4h for their final math exam. Twenty percent of students fail the exam. If studying more than 4h and failing the exam are independent events, what percent of those who study more than 4h for the exam fail it? O 15% O 10% O 8% 0 4.5%

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Forty percent of students study more than 4 h for their final math exam. Twenty percent of students fail the exam. If studying more than 4 h and failing the exam are independent events, what percent of those who study more than 4 h for the exam fail it? - ○ 15% - ○ 10% - ○ 8% - ○ 4.5%
Transcribed Image Text:Forty percent of students study more than 4 h for their final math exam. Twenty percent of students fail the exam. If studying more than 4 h and failing the exam are independent events, what percent of those who study more than 4 h for the exam fail it? - ○ 15% - ○ 10% - ○ 8% - ○ 4.5%
**Probability of Blood Types in Canadians** In this exercise, we aim to determine the probability that a person selected at random will have type O or type B blood. **Blood Type Distribution Among Canadians:** - **Type O:** 45% - **Type A:** 40% - **Type B:** 11% - **Type AB:** 4% **Question:** Calculate the probability that a randomly selected individual will have either type O or type B blood. **Options:** - 0.34 - 0.45 - 0.51 - 0.56 **Explanation:** To find the probability of selecting a person with type O or type B blood, sum the percentages of both types: \[ \text{Probability of type O or B} = 45\% + 11\% = 56\%. \] Thus, the correct answer is 0.56.
Transcribed Image Text:**Probability of Blood Types in Canadians** In this exercise, we aim to determine the probability that a person selected at random will have type O or type B blood. **Blood Type Distribution Among Canadians:** - **Type O:** 45% - **Type A:** 40% - **Type B:** 11% - **Type AB:** 4% **Question:** Calculate the probability that a randomly selected individual will have either type O or type B blood. **Options:** - 0.34 - 0.45 - 0.51 - 0.56 **Explanation:** To find the probability of selecting a person with type O or type B blood, sum the percentages of both types: \[ \text{Probability of type O or B} = 45\% + 11\% = 56\%. \] Thus, the correct answer is 0.56.
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