Question
The average number of taxis of three colours (black,
white and yellow) in a taxi stand is 144. The number of black taxis is 30 more than that of yellow taxis. The total number of black and white taxis is 255. Find the number of white taxis in a taxi stand.Solution
Let the number of white taxis be ‘x’ Therefore, number of black taxis = (255 – x) Number of yellow taxis = (255 – x – 30) = (225 – x) According to the question, 225 – x + 255 – x + x = 144 × 3 Or, x = 48
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