# Math

One bag contains 4 white balls and 3 black balls. If someone draws one ball from the bag and then replaces it and draws another, what is the probability that both will be black?

A: 8/12

B: 9/49

C: 1/6

D: 3/7

1. Do you think the balls remember what happened to them on the first draw when you do the second draw ?

What is the prob of drawing a black ball the first time?

posted by Reiny
2. Is it A?

posted by Lola
3. Why do you think it is A? are you guessing?
What is the prob of getting a black in the first draw?

posted by Reiny
4. the prob is 3/4 i think

posted by Lola
5. OHHH IS IT D??

posted by Lola
6. no and no

There are 7 balls in the bag of which 3 are black
So the prob of drawing a black the first time is 3/7

So what will happen the second draw??

posted by Reiny
7. Oh b: 9/49

posted by Lola
8. You got it!!

posted by Reiny

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