Hi Mariah!
it is great question. Thank you for posting it.
IMO
A
The formula for finding the probability of an event A:
P(A) = the number of ways event A can occur / the total number of possible outcomes
A - two shoes, that were selected from the box without replacement, have the same color
There are five pairs of shoes with different colors in a box
so 5 is the number of ways event A can occur
We find the the total number of possible outcomes with combination formula
combination formula
A formula for the number of possible combinations of r objects from a set of n objects.
Please read the lesson:
https://www.beatthegmat.com/mba/2010/08/ ... -your-head
10C2 = 10*9/2 = 45
Let us plug in the numbers
P(A) = 5/45 = 1/9
I choose answer A.
hope it helps!
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