Abag contains 2 white marbles and 7 purple marbles. two marbles are drawn at random. one marble is drawn and not replaced. then a second marble is drawn. what is the probability of selecting a purple marble and then a white marble? a.1/7 b.2/9 c.1/14 d.7/36

7/9*2/8= 7/36

your answer is D

the answer is 24

step-by-step explanation:

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -