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Use a Venn diagram to solve the followin...

Use a Venn diagram to solve the following problem:
In a statistical investigation of 1003 families of Kolkata it was found that 63 families had neither a radio nor a T.V., 794 families had a radio and 187 a television. How many families in that group had both a radio and a T.V.?

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The correct Answer is:
41
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In a statistical investigation of 1,003 families of Calcutta, it was found that 63 families had neither a radio nor a T.V, 794 families had a radio and 187 had a T.V. The number of families in that group having both a radio and a T.V is (a) 36 (b) 41 (c) 32 (d) None of these

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  7. For any two sets A and B, prove the following : B-A^c =AcapB

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  10. For any two sets A and B, prove the following : (A-B)cup(AcapB)=A

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  13. Applying set operations find the L.C.M. of the numbers 15, 25 and 30.

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