Random variable X: P(X=0)=1/2, P(X=5)=1/2. What is E(X)?
Random variable X: P(X=0)=1/2, P(X=5)=1/2। E(X) क्या है?
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Correct Answer
B. 5 / 2
ExplanationStep 1: Identify the concept: expected value. Step 2: E(X)=ΣxP(x)=0×1/2+5×1/2=5/2. Step 3: Exam tip: For mean, multiply each value by its probability.
Step 1: अवधारणा expected value है। Step 2: E(X)=ΣxP(x)=0×1/2+5×1/2=5/2। Step 3: याद रखें: Mean में value को probability से multiply करें।