MATH Prob.
posted by Twg .
A box contains two black balls and three gold balls. Two
balls are randomly drawn in succession from the box.
a. If there is no replacement, what is the probability
that both balls are black?
b. If there is replacement before the second draw, what
is the probability that both balls are black?

What is your thinking here?

What do you mean?

I will be happy to critique your thinking, but reluctant to do it for you.

I am not understanding this at all!!! I have read over my material for this class & I still don't get it!! Can someone PLEASE help me?!!!!?????

Look into the text book and search for pobability in box array. create one and then give the answers
Respond to this Question
Similar Questions

statistics
Two urns each contain yellow balls and black balls. Urn 1 contains 2 yellow balls and 6 black balls. urn2 contains 2 yellow balls and 5 black balls. A ball is drawn from each urn. What is the probability that both balls are yellow? 
math
I have a question in my math class in college. Here is the question, but I just need help on HOW to answer it. My text isn't clear at all. A box contains 2 black balls and 3 gold balls. 2 balls are randomly drawn in succession. a.if … 
Probability again
A box contains 6 red balls, 4 blue balls, and 2 green balls. Three balls are randomly drawn (without replacement) from the box. What is the probability that the three balls selected are all the same color? 
MATH 157
Can anyone please help me understand these math problems. #4. How many threesymbol codes (letternumbernumber)can be made from the letters S, P, Y, and twodigits from the set of (0, 1, 2,..., 9) without repetition? 
math
A box contains two black balls and three gold balls. Two balls are randomly drawn in succession from the box. a. If there is no replacement, what is the probability that both balls are black? 
statistics
A box contains 3 white and 5 black balls. Four balls are drawn at random "with replacement" from the box (i.e. selected balls are returned to the box and mixed, before drawing the next ball). Let X be the number of black balls drawn. … 
College Discrete
An urn contains n > 0 white balls and m > 0 black balls. Consider the experiment where two balls are drawn without replacement. What is the probability that the balls are of the same color? 
Math
A bag contains three black balls, four white balls and five red balls. Three balls are removed without replacement. What is the probability of obtaining a one of each colour b at least two red balls ? 
Math
A bag contains 5 red balls, 4 white balls, and 3 black balls. Two balls are drawn without replacement. What is the probability that at least one ball drawn is white? 
MATH
An urn contains 5 white and 6 black balls. Four balls are randomly drawn from the urn in succession, with replacement. That is, after each draw, the selected ball is returned to the urn. What is the probability that all 4 balls drawn …