CIE A level Math -Probability & Statistics 2: 6.2 Linear combinations of random variables : solving problems: Exam Style Questions Paper 6

Question

 A fair six-sided die is thrown 20 times and the number of sixes, X, is recorded. Another fair six-sided die is thrown 20 times and the number of odd-numbered scores, Y, is recorded. Find the mean and standard deviation of X + Y. [5]

Answer/Explanation

Ans:

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