A deck of 10 cards labeled 1–10 is shuffled. One card is selected at random. If the experiment is repeated 120 times, how many times will you expect to select number 5?

Answer 1

Since there are 10 cards and each card has an equal chance of being selected, the probability of selecting number 5 is 1/10.

Expected value = probability of event x number of trials

Expected number of times 5 will be selected = (1/10) x 120 = 12.

Therefore, you can expect to select number 5 12 times out of 120 trials.