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The mean of the numbers obtained on throwing a die having written 5 on four faces, 4 on three faces, 3 on two faces and 2 on one face is?

  3. 4

Answer (Detailed Solution Below)

Option 3 : 4
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Detailed Solution

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Calculation:

Let X be the random variable representing a number on the die.

The total number of observation is ten.

P(X = 5) =  

P(X = 4) = 

P(X = 3) = 

P(X = 2) = 

Mean(X) = 

Mean(X) = 

Mean(X) = 

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