
A survey was conducted on a car brand Khatara . It was found that 60% of vehicles had a problem with their engines , 60% of vehicles had a problem with their doors and 50% with tyres and 20% had no problem.. what is the min and max percentage of vehicles that have had all problems?
Min case : 80 80 30 nd Max case: 80 60 50................. 1
But by venn diagram for max case m not able to get sum as 80 but only getting the total as 70 ! Where's the problem in 1.. nd also plz help with minimum case ! 