Blog: An electrician uses tiny red, blue and yellow bulbs in a ratio 12:11:10 to light up an entire building. If 4752 bulbs were used in all, how many...

Tuesday, June 5, 2012

If we have 12+11+10 = 33 bulbs then;

12/33 is red

11/33 is blue

10/33 is yellow

Similarly if we have 4752 bulbs;

Number of red bulbs $\displaystyle={\left(\frac{{12}}{{33}}\right)}\times{4752}={1728}$

Number of blue bulbs $\displaystyle={\left(\frac{{11}}{{33}}\right)}\times{4752}={1584}$

Number of yellow bulbs $\displaystyle={\left(\frac{{10}}{{33}}\right)}\times{4752}={1440}$

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