Question

in a club, 40%members take alcohol and 30% smoke cigarettes, 20%members got both habbit then the percentage of members neither consume alcohol nor smoke cigarette is?

Answer 1

the percentage is 100 % - ( 40+30+20)

= 100 - 90

= 10 % ....

... of people consume neither alcohol nor smoke cigarettes

Answer 2

Percentage of members who take alcohol = 40%

Percentage of members who smoke = 30%

Percentage of members who do both = 20%

Find the percentage of members who do at least one of the two:

Percentage = 40 + 30 - 20 = 50%

Find the percentage of members who either consume alcohol nor smoke cigarette :

Percentage = 100 - 50 = 50%

Answer: 50% of the members neither consume alcohol nor smoke cigarette