An activity book has 21 pages of crossword puzzles, 18 pages of cryptograms, and 12 pages of mazes. Bianca randomly selects a page, completes the activity, and then randomly selects another page to complete. What is the probability that Bianca first completes a maze and then completes a crossword puzzle?
(Points : 1)
Option A: 21/88

Option B: 33/51

Option C: 28/289

Option D: 42/425

Question

An activity book has 21 pages of crossword puzzles, 18 pages of cryptograms, and 12 pages of mazes. Bianca randomly selects a page, completes the activity, and then randomly selects another page to complete. What is the probability that Bianca first completes a maze and then completes a crossword puzzle? 
(Points : 1)
       Option A: 21/88

       Option B: 33/51

       Option C: 28/289

       Option D: 42/425

anonymous · Answer

b :)

anonymous · Answer

Can you tell me how?

anonymous · Answer

i just added up all the numbers to get a denominater of 51 and added 12 and 21

welshfella · Answer

theres a total of 51 activiities and there are 12 mazes
so the probability of selecting first a maze is 12/51

welshfella · Answer

that leaves 50 pages 
there are 21 crossword puzzle pages 
so probability choosing a crossword on the second pick is 21 / 50

welshfella · Answer

snice these 2 events are independent the prob of  maze/crossword i s

12/51  * 21/50

anonymous · Answer

So D. Thank you!!! <33

welshfella · Answer

yes its D

welshfella · Answer

independent probabilities are multip;lied

anonymous · Answer

Okie Dokie, ty love