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  1. D

    For any alevels math doubts

    thank you very much.
  2. D

    For any alevels math doubts

    can anyone help me with this? May/June 2003 question 1 a fair coin is tossed 5 times and the number of heads is recorded. i) the random variable x is the number of heads. state the mean and variance of x. ii) the number of heads is doubled and denoted by the random variable y. state the mean...
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