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A boy agrees to work at the rate of one ...

A boy agrees to work at the rate of one rupee on the first day, two rupees on the second day, four rupees on the third day and so on. How much will the boy get if he starts working on the 1st of February and finishes on the 20the of February ?

A

A) `2^20`

B

B) `2^(20) - 1`

C

C) `2^(19) - 1`

D

D) `2^19`

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The correct Answer is:
B
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