A person is to count 4500 currency notes. Let ` a _{ n }` denote the number of notes he counts in the `n ^{ t h}` minut

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Q 2938467302.     A person is to count 4500 currency notes. Let ` a _{ n }` denote the number of notes he counts in the `n ^{ t h}` minute. lf `a _{1}= a _{2}=\ldots\ldots= a _{10}=150` and `a _{10}, a_{11}, ldots\ldots` are in A.P. with common difference(-2), then the time taken by him to count all notes is
A

34 minutes

B

125 minutes

C

135 minutes

D

24 minutes

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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