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A die is thrown 100 times. If the success is in getting an even number, then the variance of number of successes is
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The correct answer is:
$25$
Let
A = event "Obtainimen an even mumber when a fail tie is therwn
$\therefore p=\frac{3}{6}=\frac{1}{2} \Rightarrow 1-1-p-\frac{1}{2}$
$\therefore$ Varianco ovor 100 trails $-1100-100 \times \frac{1}{2} \times \frac{1}{2}-25$
A = event "Obtainimen an even mumber when a fail tie is therwn
$\therefore p=\frac{3}{6}=\frac{1}{2} \Rightarrow 1-1-p-\frac{1}{2}$
$\therefore$ Varianco ovor 100 trails $-1100-100 \times \frac{1}{2} \times \frac{1}{2}-25$
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