Problem 1.1.A basket of fruit is arranged out of apples, bananas, and oranges. What is the smallest number of fruit that should be put in the basket to guaranteethat there are either at least 8 apples or at least 6 bananas or at least 9 oranges

21

Step-by-step explanation:

The question is based in pigeonhole principle that says If n or  more  pigeons  are  distributed  among k >0 pigeonholes,then at least one pigeonhole contains at least pigeons.

8 + 6 + 9−3 + 1 = 21

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.