A petrol attendant recorded the number of vehicles that bought petrol from him for -3 hours and recorded 12 cars and 27 buses. What is the probability that the next vehicle will be a bus?
Prob = \(\frac{ no of expected outcome}{ no of total outcome}\)
no of cars = 12, no of buses = 27
no of total outcome = 12 + 27 = 39
no of expected outcome = 27
Prob( next vehicle will be bus) = \(\frac{27}{39} = \frac{9}{13}\)
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