In Total there are 43 jelly beans, which means that will be our denomintor.(sorry if i spelled that wrong)
12/43 are red 17/43 are white 14/43 are black = 43/43
27.9% of 43 + 39.5% of 43 + 32.6% are black = 100%
There is the highest chance that the jelly beans chosen will be white, with black following. 2 white & 3 black would be 5/43 which is 11.6% of the jelly beans in total. Of this chance there is about a 25%chance that white will be chose & 27-30% chance that black will be chosen.
I HOPE THIS HELPS <3!! & good luck.