英文数学题
Eachpersoninagroupofstudentswasidentifiedbyhisorherhaircolour,andaskedwhetherheorshep...
Each person in a group of students was identified by his or her hair colour, and asked whether he or she preferred taking classes in the morning, afternoon, or evening. The results are shown in the table below. Find the probability that a student preferred morning classes given he or she has blonde hair.
Preference Blonde Brunette Redhead
Morning 25 5 20
Afternoon 45 30 35
Evening 15 50 5 展开
Preference Blonde Brunette Redhead
Morning 25 5 20
Afternoon 45 30 35
Evening 15 50 5 展开
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