Abag contains hair ribbons for a spirit rally. the bag contains 9 black ribbons and 11 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.

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huh? im pretty sure it is in 199

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional