gold and silver coins
An urn is filled with coins and beads, all of which are either silver or gold. 20% of the objects in the urn?
An urn is filled with coins and beads, all of which are either silver or gold. 20% of the objects in the urn are beads. 40% of the coins in the urn are silver. What percentage of the objects in the urn are gold coins?
Beads = 20%
so, Coins = 80% (100% – 20%)
Silver Coins = 40% of the coins
so, Gold coins = 60% of the coins (100% of the coins – 40%)
Gold coins = 60% of 80% = 3/5*4/5 = 12/25 =
48% of the objects in the urn are Gold coins.
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