Question 13: A survey was conducted in which 130 people were asked about their favourite foods. The survey results showed the following information:
* 40 people said they like nihari
* 65 people said they liked biryani
* 50 people said they liked korma
* 20 people said they liked nihari and biryani
* 35 people said they liked biryani and korma
* 27 people said they liked nihari and korma
* 12 people said they liked all three foods nihari, biryani, and korma
\((b)\) How many people did not like nihari, biryani, or korma?
Solution:
\(\text{people who like at least one food}=85\)
\(\text{people who did not like nihari, biryani, or korma}\)\(\ =\ \)\(\text{Total People Surveyed}\)\(\ -\ \)\(\text{people who like at least one food}\)
\(\ \ \ \ \ \ \ \\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ \ \ \ \ \ \ \ \ \ \ \ =130-85\)
\(\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ \ \ \ \ \ \ \ \ \ \ \ =45\)