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 n umber of errors in these three blocks. Compute E(X) and Var(X).
1 answer:
<span>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
</span>
well E(X)=µ
and
Var(X)=E[(X-µ)^2]
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