Question 1191474
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40% of the population of Himo town are male. 
25% of the male population and 30% of the female population are under 21years. 
Find the total percentage of people in the Himo town who are under 21 years
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Let x be the total population.


The number of male   under 21 years  is 0.4*0.25x.

The number of female under 21 years  is (1-0.4)*0.3x.

The total population under 21 years  is 0.4*0.25x + (1-0.4)*0.3x.



The total percentage of people in the Himo town who are under 21 years is 

    {{{((0.4*0.25x + (1-0.4)*0.3x)/x)*100}}} = {{{(0.4*0.25 + (1-0.4)*0.3)*100}}} = 28%.    <U>ANSWER</U>
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Solved.