8月份有31天
晴天:
31/[1+(1-1/3)+(1-3/5)]
=31/(1+2/3+3/5)
=31/(31/15)
=15(天)
阴天:15*(1-1/3)=15*2/3=10(天)
雨天:15*(1-3/5)=15*2/5=6(天)
答:晴天15天,阴天10天,雨天6天
回答如满意,请点击 选为满意答案
8月份有31天
晴天:
31/[1+(1-1/3)+(1-3/5)]
=31/(1+2/3+3/5)
=31/(31/15)
=15(天)
阴天:15*(1-1/3)=15*2/3=10(天)
雨天:15*(1-3/5)=15*2/5=6(天)
答:晴天15天,阴天10天,雨天6天
回答如满意,请点击 选为满意答案