in a certain geographic region, newspapers are classified asbeing published dail
ID: 2918916 • Letter: I
Question
in a certain geographic region, newspapers are classified asbeing published daily morning, daily evening andweekly. Some of have a comics section and other don9ot. the distribution is shown her HAve Comics section morning evening weekly yes 2 3 1 no 3 4 2 if a newspaper is selcted at randopm, find theseprobabilities. a. the newspaper is a weekly publication b. the newspaper is daily morning publication or hascomics c. the newspaper is published weekly or does not havecomice in a certain geographic region, newspapers are classified asbeing published daily morning, daily evening andweekly. Some of have a comics section and other don9ot. the distribution is shown her HAve Comics section morning evening weekly yes 2 3 1 no 3 4 2 if a newspaper is selcted at randopm, find theseprobabilities. a. the newspaper is a weekly publication b. the newspaper is daily morning publication or hascomics c. the newspaper is published weekly or does not havecomiceExplanation / Answer
determine the total number of newspapers: 2+3 morning, 3+4 evening and 1+2 weekly. In total: 5+7+3=15 newspapers a) P(weekly)= number of weekly/ total number of newspapers = 3/15=1/5=0.20 b) P(morning or comics) =P(morning)+P(comics and not morning)= 5/15 +4/15= 9/15 Be aware: P(comics)= 6/15, but you count then P(morning and comic)double! c) P(weekly or no comics)= P(weekly) + P(no comics and not weekly) =3/15 + 7/15= 10/15= 2/3 Again the same story as for B. Be aware that you can get doubleprobabilities for P(no comics and weekly)
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