Estimation - Number of Red Colored Swift cars in Delhi
Guess estimate the total number of Red Colored Swift cars in Delhi
Known: Population of Delhi ~ 30 million
Let the average family size be 3.
Number of Households in Delhi,
= 30 / 3 million
= 10 million
The proportion of families owning 1 car = 30%
The proportion of families owning more than 1 car = 10%
(As many people in delhi own more than one car)
Number of cars in Delhi,
= 40% of 10 million
~ 4 million
The proportion of Swift Cars in Delhi = 1/20 or 5%
The proportion of Red color Swift cars = 1/5 or 20% of Swift cars.
(considering there are 5 variants - red, yellow, blue, maroon, and orange)
Number of Red Colored Swift cars in Delhi,
= Number of Cars in Delhi x Proportion of Swifts x Proportion of Red color in Swift
= 4 million x 1/20 x 1/5
~ 40,000 Red Swift cars.
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