Higher Secondary Question Paper Solution of Year 2018 Question No: A.2.(f)(ii)
X ও Y দুটি স্বাধীন চলক হলে প্রমান করো যে,
\(var(aX + bY)= a^2var(X) + b^2var(Y)\) যেখানে a এবং b ধ্রুবক ।
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