The probability that a spinner will land on an even number is 0.6. If the spinner is spun 80 times, how many times is it expected to land on an even number?
48
In a survey of 400 tourists who visited Egypt, 160 were from Arab countries, 120 were from Europe, 40 from Latin America, and 80 from Australia. If the total number of tourists who visited Egypt in a month was 5 000,how many of them are expected to be from Europe?
1,500
A factory produced 1 600 calculators in one day.They took a sample of those calculators and found that 3 percent were defective. What is the expected number of defective calculators produced that day?
48
Jacob plays a card game with his friend and the result can be either win, lose, or draw. Each time they play, the probability that Jacob will win is 0.5, and the probability he will lose is 0.3. If they play 50 games, what is the expected number that will end in a draw?
10
A survey of 80 students found that 40 students preferred biology, 24 preferred chemistry, and 16 preferred physics. If there are 200 students in the whole school, how many are expected to prefer chemistry based on the results of the survey?
60