Question

In a survey conducted on a group of 1000 people it is found that 40% buy product A, 20% buy product B, and 10% buy Product C, 5% buy products A and B, 3% buy products B and C and 4% buy products A and C. If 2% of the group buy all the three products, then find the number of people who buy i) product A only. ii) atleast one of the products A, B or C ​​

Answer 1

I) no. of people buying A = 1000 X 40/100
= 400 people

II) no. of people buying A, B,C= 1000 X 84/100
= 840 people.
Hope it helps!