Students in Groups

Algebra Level pending

Teachers divided students into groups of 3. Each group of 3 wrote a report that had 9 pictures in it. The students used 585 pictures altogether. How many students were there in all ?

195 210 200 190 205

2 solutions

Tom Engelsman
Mar 4, 2021

Taking $N$ students in the class, we have:

$\frac{N}{3} \cdot 9 = 585 \Rightarrow 3N = 585 \Rightarrow \boxed{N=195}.$

§Martie On Brilliant
Mar 7, 2021

Using $\mathcal Total$ $\mathcal Pictures$ $\div$ $\mathcal Pictures$ $\mathcal Per$ $\mathcal Group$ $\times$ $\mathcal Students$ $\mathcal Per$ $\mathcal Group$ $=$ $\mathcal Number$ $\mathcal Of$ $\mathcal Students$ :

3 $\frac{585}{9}$ = $195$

There were $\boxed{195}$ students in all

Students in Groups

2 solutions

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