There 5red, 6white, and 7 blue disks. You pick out a disks, record its color, and it turn it to the box. if you repeat this process 250 times, how many times van you expect to pick either a red or white disk?

However, I am told: "Box A contains 1 red ball and three white balls; Box B has ... I randomly pick a box and select a ball from the box without looking into the box ... If box B had 2 red and 4 white the probability of a red ball would be 1214+1213 = 18+16=7 24, but you would have 1+24 + 6 = 310 ... 4185 times.