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two black balls and 5 white balls are placed ina  bag. if amy draws two balls from the bag, what is the proabiblity that they are both white?

 Jun 14, 2020
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two black balls and 5 white balls are placed ina  bag. if amy draws two balls from the bag, what is the proabiblity that they are both white? 

 

The 1st ball has a 5 out of 7 chance of being white. 

If a white one is drawn, then the 2nd ball has a 4 out of 6 chance of being white. 

 

The chance of both things happening, multiply them together  5/7 • 4/6  =  20/42  =  10/21  =  about 47.6% 

.

 Jun 14, 2020

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