-advertisement-
3%

The Barry family invited 100 relatives to their Christmas party. 90 guests had Italian heritage, 80 had German heritage and 75 had Swiss heritage. What is the minimum number of people who claimed ancestry from all three heritages?

Fact Lab

-advertisement-

Interesting fact:

An event called "Carols by Candlelight" is where many famous Australian singers go to sing carols on Christmas Eve. The event is broadcast with fireworks and displays which welcome Christmas.