Multiple choice general knowledge math & puzzles

if i have rs100. while going to market i gave to a begger some money, such that the ratio of money the begger have(earliar+what i gave him) to the money that ramins with me is 2/9. If begger was earliar having the same amount as i gave him in my donation to him. How much money remains with me.

  1. data insufficient.

  2. 80

  3. 90

  4. 70

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let x be the amount given to the beggar. Since the beggar originally had the same amount as what was donated, after receiving x, he has 2x. Your remaining money is 100-x. Setting up the ratio 2x/100-x = 2/9 gives 18x = 200-2x, so 20x = 200 and x = 10. Therefore, 90 rupees remain with you.