in a survey it was found that 21 people liked product a 26 liked product b e and 29 like a product c if 14 people liked product A and B, 12 people liked product C and A ,14 people like the product B and C and 8 people liked all three products.
a) find how many people liked at least one of the products
b) find how many liked to product C only
c) find how many liked exactly one product
d) find how many liked exactly two products
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