Question

Question 5 (v)
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:
$\begin{array}{ccccc}\text{Monthly income(in Rs)}& & & \text{Vehicles per family}& \\ & 0& 1& 2& \text{Above 2}\\ \text{Less than 7000}& 10& 160& 25& 0\\ 7000-10000& 0& 305& 27& 2\\ 10000-13000& 1& 535& 29& 1\\ 13000-16000& 2& 469& 59& 25\\ 16000\text{or more}& 1& 579& 82& 88\end{array}$
Suppose a family is chosen, find the probability that the family chosen is
(v) owning not more than 1 vehicle.

Answer 1

Number of total families surveyed = 2400
(v) Number of families owning not more than 1vehicle =10+160+305+1+535+2+469+1+579 = 2062
Hence, required probability, $P=\frac{2062}{2400}=\frac{1031}{1200}$