Question 1: A bag contains 5 red balls, 3 blue balls, and 2 green balls. If you draw one ball at random, what is the expected number of red balls you will draw out of 50 draws?

Answer: 12.5

Question 2: Calculate the expected frequency of rolling a 4 on a fair six-sided die after 120 rolls.

Answer: 20

Question 3: If a survey shows that 40% of students prefer chocolate ice cream, how many students out of 200 are expected to prefer chocolate?

Answer: 80

Question 4: A spinner with 8 equal sections numbered 1 to 8 is spun 160 times. What is the expected number of times it lands on number 3?

Answer: 20

Question 5: A class has 25 students, 10 of whom are in the school choir. If a student is chosen at random, what is the expected number of choir members in a group of 4 students selected randomly?

Answer: 1.6

Question 6: In a game, a spinner has 5 red, 3 yellow, and 2 blue sectors. If the spinner is spun 100 times, how many times do you expect it to land on blue?

Answer: 20

Question 7: A factory produces 200 light bulbs daily, with a 2% defect rate. Estimate the expected number of defective bulbs produced in one day.

Answer: 4

Question 8: A survey indicates that 60% of students prefer online learning. Out of 150 students, how many are expected to prefer online learning?

Answer: 90

Question 9: A box contains 4 defective and 16 good items. If 10 items are selected randomly, what is the expected number of defective items in the sample?

Answer: 2.5

Question 10: A lottery has 1 winning ticket among 100 tickets. If 50 tickets are drawn at random, what is the expected number of winning tickets drawn?

Answer: 0.5

Question 11: A school has 300 students, and 15% participate in the school orchestra. If 30 students are selected at random, how many are expected to be in the orchestra?

Answer: 4.5

Question 12: A factory produces 500 units daily, with a 1% defect rate. Estimate the expected number of defective units per day.

Answer: 5