800 dentists recommended Flash toothpaste
Solution:
Given that, magazine as states that 4 out of 7 dentists prefer flash toothpaste
1400 dentists were surveyed
To find: Number of dentists recommended falsh toothpaste
Let "x" be the number of dentists recommended falsh toothpaste
Then, we can say,
4 out of 7 equals x out of 1400
[tex]\rightarrow \frac{4}{7} = x \times 1400\\\\\rightarrow x = \frac{4}{7} \times 1400\\\\\rightarrow x = 800[/tex]
Thus 800 dentists recommended Flash toothpaste
