There is a box full of marbles, all but two are blue, all but two are green, and all but two are red.
How many marbles are in the box ?
3 marbles. One of each color.
Answer: There are 3 marbles (1 blue, 1 green, and 1 red).
There are three marbles
A box contains 4 blue, 3 red, 5 green and 6 yellow marbles. If three marbles are drawn at random, what is the probability that at least one is green?
There are four different letters and four different letter boxes, in how many methods these letters can be dropped in the boxes, if all the four letters in a single box are not allowed?
In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls will you have to pick up so that you have at least 4 balls of the same colour?
