) एक बक्से म एक रूपया, 50 पैसेऔर 20 पैसे वाले कल 420 मसक्के है, उनकी कीमत का अनपात 13:11:7
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Given, total coins = 13x + 22x + 35x = 70x
70x = 420 => x = 6
∴No. of 50 paise coins are = 22x = 22×6=132
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