Question

Fruit for a box. people may guess which fruit is in which box, 123 people participated in the contest. when the boxes are opened / it turns out that 43 people have guessed none of the fruits correctoly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctoly. how many people have gussed three fruits correctly?

Answer 1

the answer is 10 peoples answered three fruits correctly