Question

The figure consists of a number of 4 Grey and 7white tiles of the same shape. 154 of the tiles are needed to cover a floor. How many white tiles must be brought to form the same pattern?

Answer 1

Let's use the ratio of white to total tiles to find the number of white tiles needed.

The ratio of white to total tiles is 7/11 (7 white tiles out of 11 total tiles). We can use this ratio to set up a proportion:

7/11 = x/154

where x is the number of white tiles needed.

To solve for x, we can cross-multiply:

11x = 7 * 154

11x = 1078

x = 98

So 98 white tiles must be brought to form the same pattern.