The table below shows the smoking habits of a group of asthma sufferers
NS OS RS HS T
M 358 32 90 48 528
W 307 35 77 44 463
T 665 67 167 92 991
If one of the 991 people is randomly selected, find the probability that the person is a man or a heavy smpker
If I am interpreting you table correctly, the probability of being a man (M) is 528/991 (total men dividing by the grand total) and the probability of being a heavy smoker (HS) is total HS divided by the grand total. The probability of either one event or another occurring is found by adding the probability of the individual events.
I hope this helps. Thanks for asking.
To find the probability that the person is a man or a heavy smoker, we need to add the number of men and the number of heavy smokers and then divide it by the total number of people.
From the table, we can see that the number of men (M) is 528, and the number of heavy smokers (HS) is 92. Therefore, the total number of men or heavy smokers (M or HS) is 528 + 92 = 620.
Now, we can calculate the probability by dividing the number of men or heavy smokers by the total number of people:
P(man or heavy smoker) = (number of men or heavy smokers) / (total number of people)
P(man or heavy smoker) = 620 / 991
Calculating this value, we find that the probability that the randomly selected person is a man or a heavy smoker is approximately 0.625 or 62.5%.