Question

In a certain population suppose 4% of boys are color blind and 1.4% of girls are color blind. We do a color blind test to a sample of children from this population, 60% of whom are boys. What percentage of the color blind children do we expect to be girls? Let: B = child is a boy B' = child is not a boy (i.e., is a girl) C = child is color blind C' = child is not color blind

Answer 1

Answer:

0.56 % of the total population

Explanation:

If in a certain population we know that the 60 % represent the boys and the 40 % represent the girls.

So the 40 % of girls is the 100 % of all the girl sample and just 1.4 % of girls are color blind. So..

40 % = 100 %

x        =  1.4 %

x= (1.4 %  x 40 %) / 100 %  = 0.56 % of the total population.

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