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      Question

      A street vendor sells goods of Rs. 5 on 1st

      day, on every subsequent day he sells which is just double of that sale made on the previous day. What will be the selling of the last day of the week?
      A 5⁶ Correct Answer Incorrect Answer
      B 5 × 2⁷ Correct Answer Incorrect Answer
      C 2 × 5⁶ Correct Answer Incorrect Answer
      D 5 × 2⁶ Correct Answer Incorrect Answer

      Solution

      The vendor’s sales pattern:

      • Day 1 = ₹5
      • Each next day = double of previous day
      So this is a geometric progression with
      • First term a=5a = 5a=5
      • Common ratio r=2r = 2r=2
      We need the sale on 7th day (last day of the week) . An= a x rn-1              A7 = 5 x 26

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