Question

1. a box contains 11 pink 8 blues and 9 orange marbles. If you pick two marbles without looking , what is the probability that the first will be orange and the second will be pink?

2. You accidentally dropped a coin from the top of 10 stairs. What is the probability that it will land heads up on the seventh step?

Answer 1

1. the probability of picking an orange marble is 35% and the probability of picking a pink marble second would be 66%

2. the probability is about 47%