A box contains 4 red jellies, 6 blue jellies and 5 yellow jellies. What is the probability that a j

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A box contains 4 red jellies, 6 blue jellies and 5 yellow jellies. What is the probability that a jelly chosen randomly from the box is not red?

Calculate Total Jellies:
Total Jellies = Red Jellies + Blue Jellies + Yellow Jellies
Total Jellies = 4 + 6 + 5
Total Jellies = 15

Not choosing a red jelly means choosing a blue or yellow jelly
P(not red jelly) = P(blue) + P(Yellow)
P(not red jelly) = (Blue Jelly + Yellow Jelly) / Total Jellies
P(not red jelly) = (6 + 5)/15
P(not red jelly) = 11/15