In a town 25% of the people own a car, and 40% of those car owners also own a scooter. If 1800 people own both a car and a scooter, the population of the town is:

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Accepted Answer

18000. Owning both means being in 40% of 25%, i.e. 0.40 × 0.25 = 0.10 of the population. So 0.10P = 1800 → P = 18000. (Dividing by 0.25 alone gives 7200 and by 0.40 alone gives 4500 — each uses only one of the two stages.)

In a town 25% of the people own a car, and 40% of those car owners also own a scooter. If 1800 people own both a car and a scooter, the population of the town is:

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