Multiple choice

Red Blue Yellow Total Quality 1 10 20 25 55 Quality 2 20 10 15 45 Total 30 30 40 100 A factory manufactured 100 plywood sheets in one day, in three colors and two qualities as given in the above table. What is the ratio of number of red plywood sheets manufactured to that of the number of yellow plywood sheets manufactured?

  1. 1 : 15

  2. 3 : 4

  3. 11 : 9

  4. 4 : 3
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B Correct answer
Explanation

From the table, the total number of red plywood sheets manufactured is 30, and the total number of yellow plywood sheets manufactured is 40. The ratio of red to yellow sheets is therefore 30 : 40, which simplifies to 3 : 4.

AI explanation

To find the ratio of red to yellow plywood sheets, refer to the Total row of the table. The total number of red sheets is 30, and the total number of yellow sheets is 40. The required ratio is therefore 30 to 40, which simplifies to 3 to 4.

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