B. 12.5 / 12.5
ExplanationStep 1: Mean = total sum divided by observations. Step 2: Sum is 50 and observations are 4 so mean is 12.5. Step 3: Add all observations while finding mean.
Step 1: Mean = total sum / observations। Step 2: sum 50 और observations 4 हैं इसलिए mean 12.5 है। Step 3: Mean निकालते समय सभी observations जोड़ें।
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