Question 70
The following diagram represents the survey results on two brands of chips conducted on a sample size of 50 customers. Based on the figure, how many liked none of the two brands of chips?
Solution
Let A be B1 brand and B2 be B brand.
$$A\cup B=A + B + A\cap B$$
$$A\cap B=A + B - A\cup B$$
$$=25+20-5 = 40$$
So number of people who dont like any of the brands = 50-40 =10
Option E is correct.
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