Abag contains hair ribbons for a spirit rally. the bag contains 3 black ribbons and 12 green ribbons. lila selects a ribbon at random, then jessica selects a ribbon at random from the remaining ribbons. what is the probability that lila selects a black ribbon and jessica selects a green ribbon? express your answer as a fraction in simplest form.

Total ribbons = 3 + 12 = 15
So, 
3/15 = black
12/15 = green

Therefore the probability Lila selects the black ribbon first is 12/15

Because Lila has taken one away, the total now decreases by one to 14
Therefore, there are 3/14 black ribbons now, and thus the probability that Jessica takes one is 3/14.

Then you just multiply the two together, so
12/15 x 3/14 = 36/210 = 6/35

So the final, simplified answer is 6/35

The probability of Lila selects a black ribbon is
3/15


the probability that Jessica selects a green ribbon is
12/14


good luck