求助狒狒逻辑 70题

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jaze

楼主

发表于 2011-7-8 21:08:19 | 显示全部楼层

(B) the percentage ofspring rainfalls in Plainville that are thundershowers

P (thundershowers) = P (rainfall) * P(thundershower/rainfall)

(C) the percentage of thundershowers inPlainville that result from low-pressure systems

read carefully, what we can get from this option is that some thundershowers result from low-pressure systems
we can not get the possibility that low-pressure systems result in thundershowers