A fair 4 sided die has the numbers 123 and 4 on its faces

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Reference no: EM13622633

A fair 4 sided die has the numbers 1,2,3 and 4 on its faces. The die is rolled 20 times. The random variable X represents the number of 4s obtained.

a) Find the mean and variance of X

b) Find P(x<µ-?)

Reference no: EM13622633

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