B. 40 / 40
ExplanationStep 1: Mean = total sum divided by observations. Step 2: Sum is 160 and observations are 4 so mean is 40. Step 3: Add all values for mean.
Step 1: Mean = total sum / observations होता है। Step 2: Sum 160 और observations 4 हैं इसलिए mean 40 है। Step 3: Mean के लिए सभी values जोड़ें।
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