What is the mean of the numbers 1, 2, 3, , 10 with frequencies ^9C_0, ^9C_1, ^9C_2, , ^9C_9, respectively?

NDA 2023 Mathematics question

What is the mean of the numbers with frequencies , respectively?

Answer: (C)

The number has frequency (). . $ fx = (r+1){}^ = r {}^+ =

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Question ID VK-029759