Mr. Lim has a bag with some marbles colored red, yellow, green, blue, and white. The marbles are identical in number. Mr. Lim will conduct a chance experiment by randomly drawing a marble from the bag and then returning it after noting the color. Based on 50 trials, how many green marbles will Mr. Lim expect to pick?
Since the marbles are identical in number and Mr. Lim is conducting a random experiment with replacement, the probability of picking a green marble in each trial is 1/5.
So, the expected number of green marbles picked in 50 trials can be calculated as:
Expected number of green marbles = Probability of picking a green marble x Number of trials
Expected number of green marbles = (1/5) x 50
Expected number of green marbles = 10
Therefore, Mr. Lim can expect to pick 10 green marbles in 50 trials.