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Small cars get better gas mileage, but they are not as safe as bigger as cars. Small cars accounted for 18% of the vehicles on the road, but accidents in involving small cars led to 11,898 fatalities during a recent year (Reader's Digest, May 2000). Assume the probability a small car is involved in an accident is .18. The probability of an accident involving a small car leading to a fatality is .128 and the probability of an accident involving a fatality. What is the probability a small car was involved? Assume that the likelihood of getting into an accident is independent of car size.

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关键词：Probability bability Ability ABI Rob 高手 Probability