CEE Kerala Engineering
CEE Kerala Engineering Solved Paper-2008
question_answer
In a certain town 25% families own a cell phone, 15% families own a scooter and 65% families own neither a cell phone nor a scooter. If 1500 families own both a cell phone and a scooter, then the total number of families in the town is
A) 10000
B) 20000
C) 30000
D) 40000
E) 50000
Correct Answer:
C
Solution :
Let the total population of town be\[x\]. \[\therefore \] \[\frac{25x}{100}+\frac{15x}{100}-1500+\frac{65x}{100}=x\] \[\Rightarrow \] \[\frac{105x}{100}-x=1500\] \[\Rightarrow \] \[\frac{5x}{100}=1500\] \[\Rightarrow \] \[x=30000\]