of the last 20 trains to arrive at wildgrove station, 12 were on time. considering this data, how many of…

of the last 20 trains to arrive at wildgrove station, 12 were on time. considering this data, how many of the next 5 trains would you expect to be on time? trains

of the last 20 trains to arrive at wildgrove station, 12 were on time. considering this data, how many of the next 5 trains would you expect to be on time? trains

Answer

Answer:

3

Explanation:

Step1: Calculate the on - time rate

The on - time rate $r=\frac{12}{20}=0.6$.

Step2: Predict the number of on - time trains

The expected number of on - time trains in the next 5 trains is $n = 5\times r$. Substitute $r = 0.6$ into the formula, we get $n=5\times0.6 = 3$.