Question

In a race, there are 100 bikes, consisting of yellow and green bikes. The average speed of all the bikes is 35 km/hr. The average speed of the yellow bikes is 55 km/hr, and the average speed of the green bikes is 30 km/hr. How many of the bikes are green?

• A. 50
• B. 80
• C. 65
• D. 70

Answer 1

Answer:

B. 80

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