# Thread: Easy probability that is not so easy for me!

1. ## Easy probability that is not so easy for me!

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!

2. Originally Posted by puzzledwithpolynomials
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!
2/7 looks good to me. What does the book say?