A check of 1-10 is shuffled. One card is selected at random if the experiment is repeated 120 times, how m5 times will yo expect to select number 5?

1 answer

Since each number appears on the check exactly once, the probability of selecting any particular number is equal to 1/10. Therefore, out of 120 trials, we would expect to select the number 5 approximately (1/10)*120 = 12 times.