3. Start with finding the number of people for each category; what was bought by 2 categories pasta and pizza and work from there.
76- got pizza and pasta;
76-got only pasta;
287-76= 211 got only pizza;
600-(211+76+76)= 237 din not get anything;
Next probability:
i) number of people that got pizza and pasta/ total number of people so is 76/600
ii) (211/600)+(152/600)-(76/600)
iii) 211/600
iiii) 237/600