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

Answer:

$60$ times

Step-by-step 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 $\frac{3}{15}=\frac{1}{5}$. 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 $\frac{1}{5}*300=60$ times if $1$ marble is pulled $300$ times at random. Hope this helps!