Question

You have 7 red marbles and 5 green marbles in a bag. You select one, do not replace it then select another.

Find P(red,red) and P (green,green). Write probabilites as a percent and rounded to the nearest whole percent.

Find P(red,green) and P (green,red). Compare.

Answer 1

the probability of both/all events occurring is found by multiplying the probabilities of the individual events.

P(red,red) = 7/12 * 6/11 = ?

P (green,green) = 5/12 * 4/11 = ?

P(red,green) = 7/12 * 5/11 = ?

P (green,red) = 5/12 * 7/11 = ?

How do the last two compare?