Question 179
Out of 100 families in the neighbourhood, 50 have radios, 75 have TVs and 25 have VCRs. Only 10 families have all three and each VCR owner also has a TV. If some families have radio only, how many have only TV?
Solution
It is given that 25 families have VCRs and each VCR owner also has a TV
=> TV owners who do not have VCR = 75 - 25 = 50
Also, 10 families have all three items
=> No. of families having only TV = 50 - 10 = 40
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