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16-12-2016
Mathematics

contestada

There is one error in one of five blocks of a program. To find the error, we test three randomly selected blocks. Let X be the number of errors in these three blocks. Compute E(X) and Var(X).

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syed514 syed514

23-12-2016

The probability, or expectation value for X in a block, equals the number of occurrences of X in all the blocks divided by the total number of blocks

well E(X)=µ and

Var(X)=E[(X-µ)^2]

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