predict the probabaility of how many times each marble is pulled if we did the experiment 288 times

Question

predict the number of times you would get each type of marble if you do this experiment 288 times with 1 of each type of marble,black,striped,wavy lined,dotted

Answer 1

There is one marble of each type, so the probability of selecting a particular type is ¼. The average number of marbles for each type is 288/4=72. That is, in 288 trials you would expect to draw 72 black, 72 striped, 72 wavy lined, 72 dotted on average.