ample will always test positive, no matter how many negative samples it is mixed with. Assuming the probability of a single sample testing positive is 0.1, find the probability of a positive result for five samples combined into one mixture. Is the probability low enough so that further testing of the individual samples is rarely necessary? The probability of a positive test result is (Round to three decimal places as needed.) Is the probability low enough so that further testing of the individual samples is rarely necessary? O A. The probability is not low, so further testing will not be necessary for any of the mixtures. O B. The probability is low, so further testing of the individual samples will be a rarely necessary event. O C. The probability is not low, so further testing of the individual samples will frequently be a necessary event. O D. The probability is low, so further testing will be necessary for all of the combined mixtures.

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**Testing for a Disease Using Combined Samples**

To increase efficiency in disease testing, samples can be combined. When samples from five people are grouped and yield a negative result, it confirms all five are negative. Conversely, a positive result in a mixed sample indicates at least one positive. For a single sample, assume a 0.1 probability of testing positive. Determine the probability of a positive result for five combined samples and assess if further individual testing is rarely needed.

**Task:** Find the probability of a positive test result for five combined samples.

**Question:** Is the probability low enough to avoid frequent further testing of individual samples?

**Answer Choices:**

- **A.** The probability is not low, so further testing is not necessary for any mixtures.
- **B.** The probability is low, so further testing will be a rare necessity.
- **C.** The probability is not low, so further testing will often be necessary.
- **D.** The probability is low, so further testing is necessary for all mixtures. 

(*The question requires rounding to three decimal places.*)
Transcribed Image Text:**Testing for a Disease Using Combined Samples** To increase efficiency in disease testing, samples can be combined. When samples from five people are grouped and yield a negative result, it confirms all five are negative. Conversely, a positive result in a mixed sample indicates at least one positive. For a single sample, assume a 0.1 probability of testing positive. Determine the probability of a positive result for five combined samples and assess if further individual testing is rarely needed. **Task:** Find the probability of a positive test result for five combined samples. **Question:** Is the probability low enough to avoid frequent further testing of individual samples? **Answer Choices:** - **A.** The probability is not low, so further testing is not necessary for any mixtures. - **B.** The probability is low, so further testing will be a rare necessity. - **C.** The probability is not low, so further testing will often be necessary. - **D.** The probability is low, so further testing is necessary for all mixtures. (*The question requires rounding to three decimal places.*)
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