作者yichun1125 (小純)
站內Statistics
標題[問題] 關機率學的數學問題，請各位大大幫忙，謝謝
時間Tue Aug 21 11:43:59 2007
An insurance company estimates that 40% of policyholders who have only an auto
policy will renew next year and 60% of policyholders who have only
a homeowners policy will renew next year.The company estimates that 80% of
policyholders who have both an auto and a homeowners policy will renew at
least at least one of those policies next year.
Company records show that 65% of policyholders have an auto pokicy, 50% of
policyholders have a homeowners policy, and 15%of policyholders have both an
auto and a homeowners policy.
Using the company's estimates, calaulate the percentage of policyholders that
will renew at least one policy next year.
請問這題的意思是在表達什麼？該如何計算？
謝謝
因為題目看不懂沒辦法算
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