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there is a shortage of tubelights , bulbs and fans .
All houses do not have either tubelight or bulb or fan
exactly 19% of houses do not have just one of these
Arleast 67% houses do not have tubelights
Atleast 83% of houses do not have bulbs
Atleast 73% of houses do not have fans
What percentage of houses has all three items missing?
Please explain in a simple way .
