placed marbles in a bag. 6 of the marbles are red and 4 of

them are yellow. reach into the bag and
remove two marbles.
a.) i.) What is the probability that both of the marbes you draw out are red?
ii.) What is the probability that both of the marbles that you draw out are the same
(both red or both yellow)?
b.) Three of your friends are with you
you to remove two orbs and look at them, you put them back in
and he makes your three friends do the same in turn (take two out, look at them,
and replace them).
Find the probability that exactly two of you draw out both red marbles.

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.

a1. P = 6/10 * 5/9 = ?

a2. Either-or probabilities are found by adding the individual probabilities.

answer to a1 + (4/10*3/9) = ?