Me on this
1.a bag has 2 green marbles, 3 red marbles, and 3 yellow marbles. what is the probability that you pick a green marble, do not replace it, and pick another green marble?
a.3/28
b.1/28
c.9/56
d.1/8
2.a bag has 2 yellow, 7 red, and 1 green marble. what is the probability of picking a red marble, replacing it, and then picking another red marble?
a.1/25
b.1/50
c.49/100
d.7/100
3.a bag contains 5 white marbles, 4 black marbles, and 1 red marbles. find the probability of picking a red marble?
a.1/10
b.1/2
c.2/5
d.1/5
4.find the number of permutations of the first 13 letter of the alphabet taking 4 letters at a time.
a.17,160
b.15,120
c.3024
d.504