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?
- \(\frac{4}{39}\)
- \(\frac{4}{13}\)
- \(\frac{5}{13}\)
- \(\frac{6}{13}\)
-
\(\frac{9}{13}\)
The correct answer is: E
Explanation
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) = \(\frac{27}{39} = \frac{9}{13}\)