Question

During the process of collecting the data of reading fortnightly magazines a, b and c, a survey company surveyed 20,000 families. The company found that 20% families read magazine a, 40% families read magazine b, and 10% families read magazine c, 5% families read a and b, 3% read b and c and 4% read a and

c. If 2% families read all the three magazines, then the percentage of the families who read magazine b only is

Answer 1

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Answer 2

total number of people reading

b and all three magazines

= 5 + 2 +3. (5%read a, b. 3% read b, c)

= 10 %

people reading magazine b

= 40 - 10 = 30%