15. Total population of a city is 9500 male populat
is increased by 14.2% and female population
increased by 17.7% and total population of to
becomes 11003 if out of total male populati
15% are boys and out of total female populati
18% are girls. find difference between numbers
boys and girls?
Answers
Step-by-step explanation:
- difference between number of boys and girls is 26
Given : Total population of a city is 9500
male population increased by 14.2%
female population increased by 17.7% and
total population of becomes 11003
out of total male population 15% are boys and
out of total female population 18% are girls.
To find : difference between numbers boys and girls
Solution:
Male = 100X
Female = 9500 - 100X
male population increased by 14.2% = 14.2X
female population increased by 17.7% = (17.7/100)(9500 - X)
= 1,681.5 - 17.7X
Population increased = 14.2X + 1,681.5 - 17.7X = 1,681.5 - 3.5X
Population increased = 11003 - 9500 = 1503
1,681.5 - 3.5X = 1503
=> X = 51
Male = 5100
Female = 4400
out of total male population 15% are boys => (15/100)5100 = 765
out of total female population 18% are girls. => (18/100)4400 = 792
difference between numbers boys and girls = 792 - 765 = 27
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