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#21245

data analysis

probability

medium

90 sec

Calculator OK

At a parking lot, there are a total of $400$ vehicles. Each vehicle is either a car, a truck, or a motorcycle. If one of these vehicles is selected at random, the probability of selecting a car is $0.55$ , and the probability of selecting a truck is $0.20$ . How many motorcycles are in the parking lot?

• Up to 5 characters (6 if negative). Only numbers, decimal (.), fraction (/), negative (-).
• Fractions must be in lowest terms.
• Mixed numbers must be converted to improper fractions.