In a bag of 400 jelly beans, 25% of the jelly beans are red in color. if you randomly pick a bean from the bag, what is the probability that the jelly bean picked is not one of the red jelly beans?

25% of 400 is 100.

It means that there are 100 red jelly beans and 300 belly jeans of a different colour in the bag.

Your chance of picking a jelly bean out of the bag which isn't red is 300/400. 300/400 is equal to 75% therefore the chance of not selecting a red jelly bean out of the bag is 0.75.