Question 1198918
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You need to consider the worst case scenario on a problem like this.  In this problem we want to find the largest number of socks we can pull out of the drawer WITHOUT getting 4 pairs of the same color.<br>
There are only 4 red socks, so we will never get 4 pairs of red socks.  So in our worst case scenario we pick all 4 of the red socks.<br>
There are enough blue and green socks to make four pairs of either color.  To get 4 pairs of either color, we need 8 socks of that color.  So our worst case scenario is to get 7 blue and 7 green before we get 8 of either color.<br>
So in the worst case, without getting 4 pairs of one color, we can get 4 red, 7 blue, and 7 green, for a total of 18 socks.<br>
After that, the 19th sock we pull out of the drawer must be either blue or green, giving us 4 pairs of that color.<br>
ANSWER: Toni needs to pull 19 socks out of the drawer to be sure she has 4 pairs of the same color.<br>