Question

A box contains 6 red marbles, 4 green marbles, 3 blue marbles, and 2 yellow marbles. If Greg chooses one marble at random 300 times, how many times would he expect the marble to be blue?

Answer 1

`60` times

Explanation:

There are
`6+4+3+2=15` marbles in total. Out of those,
`3` are blue, so the probability of pulling a blue marble is
`(3)/(15)=(1)/(5)`. However, this is only the probability of pulling a blue marble when
`1` marble is pulled at random. Therefore, we can expect a blue marble to be pulled
`(1)/(5)*300=60` times if
`1` marble is pulled
`300` times at random. Hope this helps!