a merchant surveyed 400 ppl.180 learned abt the sale of
TV,90 from radio and newspapers,50 from TV and
newspapers,30 from all the three sources.draw a venn
diagram n explain how many learnt
a) newspapers or radio, but not from both?
b) only from newspapaers?
c) from radio or television but not the newspaper?
d) from radio and television but not the newspaper?
e) from atleast two of the three media?

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