Question

From a bunch of flowers having 16 red roses and 14 white roses, four flowers have to be selected. In how many different ways can they be selected such that at least one red rose is selected?

Answer 1

the possibilites are
let white roses be w and red ones be r
so possibilities
W W W W
W R W W
R R R R
W R W R
W R R R

SO there 4 different ways that at least 1 red is selected