Mathematics · Probability
एक टोकरी में 4 लाल, 5 काली, 3 हरी और 4 सफेद कंचे (marbles) हैं। यदि टोकरी से यादृच्छिक रूप से (at random) 2 कंचे निकाले जाते हैं, तो दोनों के हरे होने की प्रायिकता क्या है?
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