Consider the following sum:

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M: +2.50/-0.83

• + 1• + 2• + •3 + •1 = 21•

In the above sum, • stands for

[Paper II (CSAT) Analysis 2018]

A 4

B 5

C 6

D 8

Answer is (d). The given expression can be expanded as: x + 10 + x + 20 + ...

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