Question

A bag contains 4 and 3 white into blue marbles 3 marbles are drawn at random determine the number of ways of selecting at least one white marble in the selection

Answer 1

Number of ways of selecting at least one white marble
= Total number of ways to select 3 marbles - Total number of ways to select 3 marbles such that no white marble is selected.
= 9c3 - 6c3
because there are 9 total marbles and 6 non white marbles
= 84 - 20
= 64

Answer 2

64 is the answer.....