In a bag containing red, green, and blue pens. The ratio of red, blue, and green pens, in the given order, was 7 : 4 : 9. If the total number of pens in the bag was 320, how many of them were red?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 112.
Calculations:
Let the number of red, blue, and green pens be 7x, 4x, and 9x.
The total number of pens in the bag = 320
⇒ 7x + 4x + 9x = 320
⇒ 20x = 320
⇒ x = 16
Number of red pens = 7x = 7 × 16 = 112