Probability 3847

Out of 20 boys playing football or handball, 16 boys play football, and 9 boys play handball. Determine the percentage probability that, by randomly selecting a boy, he plays:

a) football only;
b) only handball
c) football and handball

Correct answer:

a =  55 %
b =  20 %
c =  25 %

Step-by-step explanation:

p=16+920=5 a=100 11/20=55%
b=100 4/20=20%
c=100 p/20=100 5/20=25%

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