Tuesday, June 5, 2012

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...

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 `= (12/33)xx4752 = 1728`


Number of blue bulbs  `=(11/33)xx4752 = 1584`


Number of yellow bulbs `=(10/33)xx4752 = 1440`

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