1.

There are 4 types of pens, blue, red, green and black in the ratio of 3 ∶ 8 ∶ 5 ∶ 4. If green pens are 40 more than blue pens. Find the quantity of black pens.1). 602). 703). 754). 80

Answer»

From GIVEN data-

BLUE, red, GREEN and black in the ratio of 3 ? 8 ? 5 ? 4

Let the common multiplication constant be X.

∴ We can say there are 3X blue pens, 8X red, 5X green and 4X black pens in the collection.

As given- green pens are 40 more than blue pens.

∴ 5X - 3X = 40

∴ X = 20

∴ Black pens are 4X

∴ Number of black pens are = 4 × 20 = 80

∴ Answer is 80.


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