Three marbles are chosen from the jar without replacement. What is the probability that at least one is white?

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.

Ithink i know it but i want to be sure so can you me out ?