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Probability — MATHS STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceMATHSProbability2 Marks
Question
The mean of a binomial distribution is $10$ and its standard deviation is $2;$ write the value of $q.$
✓

Answer

Mean of the binomial distribution, i.e. $\text{np}=10$
Variance $= ($Standard deviation$)^2,$ i.e. $\text{npq}=4$
$\therefore\text{q}=\frac{\text{Variance}}{\text{Mean}}=0.4$

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