According to a survey conducted in a city, 25 $%$ were doctors, 30 $%$ were engineers, 15 $%$ were businessmen and rest were illiterates. Find the number of illiterates if the total population of the city is 5000.

Q. A survey of people in a given region showed that

20 %

were smokers. The probability of death due to lung cancer, given that a person smoked, was

10

times the probability of death due to lung cancer, given that a person did not smoke. If the probability of death due to lung cancer in the region is

0.006

, what is the probability of death due to lung cancer given that a person is a smoker?

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Out of 200 newly inducted personals by a Multinational company, 25% were IIT engineers and the rest were engineers from other colleges, 60 were smokers and 30% of the non-smokers were from IIT. What is the number of persons from IIT who were smokers as well?

The correct option is A 8solution:(25 % of 200 are iitians ) =50 number of smokers = 60 number of non smokers = 14030% of 140 = iitans non smokers = 42iitian which are smokers = total iitians - total iitian which are non smokers = 50 -42 = 8hence the correct option: A

Out of $200$ newly inducted personals by a Multinational company, $25$ % were IIT engineers and the rest were engineers from other colleges, $60$ were smokers and $30$ % of the non-smokers were from IIT. What is the number of persons from IIT who were smokers as well?

The correct option is A $8$
solution:
(25 % of 200 are iitians ) =50
number of smokers = 60
number of non smokers = 140
30% of 140 = iitans non smokers = 42
iitian which are smokers = total iitians - total iitian which are non smokers = 50 -42 = 8
hence the correct option: A