Question

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 red, blue and yellow bulbs were used?
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Answer 1

Step-by-step explanation:

let the no of lights be x

now,

red- 12x

blue- 11x

yellow- 10x

ATQ→

12x+11x+10x=4752

33x=4752

x=4752/33

x=144

so, red Bulb- 12×144=1728

blue bulb- 11×144=1584

yellow bulb- 10×144=1440