While playing a game, Rachel pulls two tiles out of a bag without looking and without replacing the first tile. The bag has two colors of tiles--black and white. There are 10 more white tiles than black tiles.
a. Write and simplify an expression that represents the probability that Rachel will pick a black tile, then a white tile.
A: x(x + 10)/(2x + 10)(2x + 9)
b. What is the probability that Rachel pulls a black tile and then a white tile if there are 5 black tiles in the bag berfore her first pick? Round your answer to the nearest hundredth.
A: ?
5 answers
You got (a) correct. So, for (b), just plug in x=5 and evaluate the fraction.
Thank you so much! So the correct answer is 15/76 or 0.20?
Please, will you help me with my other posts as well?
Please, will you help me with my other posts as well?
Am I correct?
you are correct
the answer for a is x(x+10)/ (2x+10) (2x+9)
the answer for b is 0.20
the answer for b is 0.20
3 answers