What is the total probability of ending up with 3 blue marbles out of 7 marbles from the bag?

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

Three people are traveling and need to exchange the currency of their native country for the currency of the country they are visiting. drag each exchange to the category that shows the ratio of currencies in that exchange.

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).