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Leo is going to use a random number generator 400 times. Each time he uses it, he will get a 
1,2,3,4, or 5 .
What is the best prediction for the number of times that Leo will get an odd number?
Choose 1 answer:
(A) Exactly 133 times
(B) Close to 133 times but probably not exactly 133 times
(C) Exactly 240 times
(D) Close to 240 times but probably not exactly 240 times

Leo is going to use a random number generator 400400 times. Each time he uses it, he will get a 1,2,3,4 1,2,3,4 , or 55 .\newlineWhat is the best prediction for the number of times that Leo will get an odd number?\newlineChoose 11 answer:\newline(A) Exactly 133133 times\newline(B) Close to 133133 times but probably not exactly 133133 times\newline(C) Exactly 240240 times\newline(D) Close to 240240 times but probably not exactly 240240 times

Full solution

Q. Leo is going to use a random number generator 400400 times. Each time he uses it, he will get a 1,2,3,4 1,2,3,4 , or 55 .\newlineWhat is the best prediction for the number of times that Leo will get an odd number?\newlineChoose 11 answer:\newline(A) Exactly 133133 times\newline(B) Close to 133133 times but probably not exactly 133133 times\newline(C) Exactly 240240 times\newline(D) Close to 240240 times but probably not exactly 240240 times
  1. Identify Odd Numbers: Identify the possible outcomes that are considered odd numbers from the random number generator.\newlineThe random number generator can produce 11, 22, 33, 44, or 55. The odd numbers in this set are 11, 33, and 55.
  2. Calculate Probability: Calculate the probability of getting an odd number on a single trial.\newlineSince there are 33 odd numbers (11, 33, and 55) out of 55 possible outcomes, the probability of getting an odd number is 35\frac{3}{5}.
  3. Predict Odd Outcomes: Use the probability to predict the number of times an odd number will occur out of 400400 trials.\newlineTo find the expected number of times an odd number will occur, multiply the total number of trials by the probability of getting an odd number.\newlineExpected number of odd outcomes == Total trials ×\times Probability of an odd number\newlineExpected number of odd outcomes =400×(35)= 400 \times \left(\frac{3}{5}\right)
  4. Perform Calculation: Perform the calculation to find the expected number of odd outcomes. Expected number of odd outcomes = 400×(35)=400×0.6=240400 \times \left(\frac{3}{5}\right) = 400 \times 0.6 = 240

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