A person is to count 4500 currency notes. Let an denotes the numb… - Vidyadip

MCQ

A person is to count 4500 currency notes. Let an denotes the number of notes he counts in the $n$th minute. If $a_1=a 2$ $=\ldots$. $a_{10}=150$ and $a_{10}, b_{11}, \ldots$ are in AP with common difference 2 , then the time taken by him to count all notes, is:

A
24 min
✓
34 min
C
125 min
D
135 min

✓

Answer

Correct option: B.

34 min

34 min

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