Bunuel wrote:
In a box with 10 blocks, 3 of which are red, what is the probability of picking out a red block on each of your first two tries? Assume that you do NOT replace the first block after you have picked it.
A. 1/15
B. 9/100
C. 2/15
D. 9/50
E. 9/25
first two tries picking red block ; 3/10*2/9 ;1/15
IMO A
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