A doctor is studying the relationship between blood pressure andheartbeat abnormalities in her patients. She tests a random sampleof her patients and notes their blood pressures (high, low, ornormal) and their heartbeats (regular or irregular). She finds that:14% have high blood pressure.• 22% have low blood pressure.15% have an irregular heartbeat.• Of those with an irregular heartbeat, one-third have high blood pressure.• Of those with normal blood pressure, one-eighth have an irregularheartbeat.What portion of the patients selected have a regular heartbeat and lowblood pressure? (0.2)

Name: A doctor is studying the relationship between blood pressure andheart
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Description: A doctor is studying the relationship between blood pressure andheartbeat abnormalities in her patients. She tests a random sampleof her patients and notes their blood pressures (high, low, ornormal) and their heartbeats (regular or irregular). She

The contingency table for the above data is as under Irregular Regular Total High 0.05 0.09…

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What portion of the patients selected have a regular heartbeat and low blood pressure? (0.2)

A First Course in Probability (10th Edition)

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A doctor is studying the relationship between blood pressure and
heartbeat abnormalities in her patients. She tests a random sample
of her patients and notes their blood pressures (high, low, or
normal) and their heartbeats (regular or irregular). She finds that:
14% have high blood pressure.
• 22% have low blood pressure.
15% have an irregular heartbeat.
• Of those with an irregular heartbeat, one-third have high blood pressure.
• Of those with normal blood pressure, one-eighth have an irregular
heartbeat.
What portion of the patients selected have a regular heartbeat and low
blood pressure? (0.2)

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