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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 |
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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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