Answer:
5/9
Step-by-step explanation:
You put the total amount of blue marbles over the total number of marbles and you get 15/27, which simplifies to 5/9
a) The total number of vehicles is 2450, and the number of vehicles that didn't use a toll pass is 1566, so the probability is:

b) If it's given that the vehicle is a truck, the number of trucks is 951, and the number of trucks that didn't use a toll pass is 610, so the probability is:
Step-by-step explanation:
12x - 6 is your answer in simplified form
Square Root of 7
= 2.64575131106