Question : The pie chart given below shows the number of bikes sold by 8 different companies. The total number of bikes sold by all these 8 companies is 2000. The number of bikes sold by a particular company is shown as a percent of the total number of bikes sold by all these 8 companies. What is the difference between the average number of bikes sold by P, Q, R, and S and the average number of bikes sold by T, U, V, and W?
Option 1: 150
Option 2: 200
Option 3: 175
Option 4: 125
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Correct Answer: 150
Solution : Number of bikes sold by P, Q, R, and S = (21 + 19 + 5 + 20)% of 2000 = 1300 The average number of bikes sold by P, Q, R, and S = $\frac{1300}{4} = 325$ Total number of bikes sold = 2000 So, the average number of bikes sold by T, U, V, and W = $\frac{(2000 - 1300)}{4} = 175$ Now, the difference = 325 – 175 = 150 ∴ The difference between the average number of bikes sold by P, Q, R, and S and the average number of bikes sold by T, U, V, and W is 150. Hence, the correct answer is 150.
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