Mathematics: Asoftware company keeps a ratio of 2.5 testers to every 10 software developers. if the company hires 20 developer in one year, how many testers will they need to hire to keep the ratios right?

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Asoftware company keeps a ratio of 2.5 testers to

aaronlikly

02.01.2022

Step-by-step explanation:

Let x be the number of the developers that there were in the company before the hirings, and y the number of testers.

You now that:

$\frac{y}{x} = \frac{2.5}{10}$

Then,

y = $\frac{2.5x}{10}$

Now:

$\frac{y + n}{x + 20} = \frac{2.5}{10}$

$\frac{2.5x}{10}$ + n = $\frac{2.5(x+20)}{10}$ = $\frac{2.5x}{10}$ + $\frac{2.5 * 20}{10}$

n = $\frac{2.5 * 20}{10}$ = 5

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