Multiple choice

In a bag, there are some 20 rupees, 10 rupees and 5 rupees notes in the ratio 2 : 3 : 4. If there are all in all Rs. 360 in the bag, how many 10 rupees notes are there.

  1. 8

  2. 12

  3. 4

  4. 6

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

Let the notes be 2x, 3x, 4x. Total value: 2x(20) + 3x(10) + 4x(5) = 40x + 30x + 20x = 90x = 360, so x = 4. Number of Rs. 10 notes = 3x = 12. Option A (8) incorrectly uses x = 4 without multiplying by 3.