6) The table below describes the smoking habits of a group of asthma sufferers.
ID: 3064925 • Letter: 6
Question
6) The table below describes the smoking habits of a group of asthma sufferers. Occasional Regular Heavy Nonsmoker smoker smoker smoker Total 34 467 36 529 70 996 Men 339 377 716 32 65 61 84 145 Women Total If one of the 996 people is randomly selected, find the probability of getting a regular or heavy smoker. 7) The table below describes the smoking habits of a group of asthma sufferers. Occasional Regular Heavy Men 384 349 Nonsmoker smoker smoker smoker Total 40 530 38 503 87 1033 64 72 136 Women Total If one of the 1033 people is randomly selected, find the probability that the person is a man or a heavy smoker.Explanation / Answer
6)The table describes the smoking habits of a group of asthmas sufferers:
Total number of regular or heavy smoker=(145+70)=215 (for both genders i.e Men and Women)
Total number of people=996
If one of the 996 people is randomly selected, then the probability of getting a regular or heavy smoker is:
Probability(getting regular or heavy smoker)=P(getting regular or heavy smoker)=(215/996)=0.2158=0.216
7)The table describes the smoking habits of a group of asthmas sufferers:
Total number of Men=530
Total number of heavy smoker=87
Total number of men who are heavy smoker=49
If one of the 1033 people is randomly selected, then the probability that the person is a man or a heavy smoker is:
Probability( a man or a heavy smoker)=Probability(a man)+Probability(a heavy smoker)-Probability(a man and a heavy smoker)
P(a man or a heavy smoker)=P(a man)+P(a heavy smoker)-P(a man and a heavy smoker)
P(a man or a heavy smoker)=(530/1033)+(87/1033)-(49/1033)=(530+87-49)/1033=568/1033=0.5498=0.55
Nonsmoker Occasional smoker Regular smoker Heavy smoker Total Men 339 33 61 34 467 Women 377 32 84 36 529 Total 716 65 145 70 996Related Questions
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