- From a box containing 3 white balls and 7 black balls, 30 balls are drawnwith replacement.Find the probability of getting 9 and 10 white balls?

I'm having a little bit of trouble finding how to work it out any help would be much appreciated.

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- April 3rd 2010, 10:29 AMFunnelCan any one explain this question to me, thxs.
- From a box containing 3 white balls and 7 black balls, 30 balls are drawn

__with replacement.__Find the probability of getting 9 and 10 white balls?

I'm having a little bit of trouble finding how to work it out any help would be much appreciated. - April 3rd 2010, 12:22 PMArchie Meade