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  4. In a certain town 65 % families own cellphones, 15000 families own scooter and 15 % families own both. Taking into consideration that the families own at least one of the two, the total number of families in the town is

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Q. In a certain town $65 \%$ families own cellphones, $15000$ families own scooter and $15 \%$ families own both. Taking into consideration that the families own at least one of the two, the total number of families in the town is

KCETKCET 2021Sets

Solution:

$x=\frac{65 x}{100}+15000-\frac{15 x}{100}$
$=30,000$