The probability of randomly taking 2 blue notebooks from a shelf which has 4 blue and 3 black notebooks.
My work:
(4/7)*(3/6)=2/7
The back of the book says something different though!
The probability of randomly taking 2 blue notebooks from a shelf which has 4 blue and 3 black notebooks.
My work:
(4/7)*(3/6)=2/7
The back of the book says something different though!
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Originally Posted by puzzledwithpolynomials 
