Question

Question 5 (iii)
An organization selected 2400 families at random and surveyed them to determine a relationship between income level and the number of vehicles in a family. The information gathered is listed in the table below:
$\begin{array}{ccccc}\text{Monthly income(in Rs)}& & & \text{Vehicles per family}& \\ & 0& 1& 2& Above2\\ \text{Less than 7000}& 10& 160& 25& 0\\ 7000-10000& 0& 305& 27& 2\\ 10000-13000& 1& 535& 29& 1\\ 13000-16000& 2& 469& 59& 25\\ 16000\text{or more}& 1& 579& 82& 88\end{array}$
Suppose a family is chosen, find the probability that the family chosen is
(iii) earning less than Rs7000 per month and does not own any vehicle.

Answer 1

Number of total families surveyed = 2400
(iii) Number of families earning less than Rs7000 per month and does not own any vehicle = 10
Hence, required probability, $P=\frac{10}{2400}=\frac{1}{240}$