Question
In a box, there are some coins and rings which are
either silver or gold. If 40% of the objects are rings and 50% of the coins are silver, then find out the total number of gold coin if there are only 120 rings in the box?Solution
40% of the objects are rings So, total objects = 120/40  × 100 = 300 60% of the object are coin -= 300 ×  60/100 = 180 Total coin = 180 Total gold coin = 50% of total coin = 180 ×  50/100 = 90
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