# RS Aggarwal Solutions Class 9 Mathematics Solutions for Probability Exercise 19 in Chapter 19 - Probability

Question 7 Probability Exercise 19

On a particular day, at a crossing in a city, the various types of 24 vehicles going past during a time interval were observed under:

Types of vehicle Frequency
Two-wheelers 84
Three-wheelers 68
Four-wheelers 88

Out of these vehicles, one is chosen at random. What is the probability that the chosen vehicle is a two-wheeler?

It is given that

Number of vehicles = 240

Number of two wheelers = 84

We know that

Required probability = number of two wheelers/ number of vehicles

By substituting the values

Required probability = 84/240

By division

Required probability = 0.35

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