Mathematics · Probability
एक बॉक्स में 14 काले, 12 नीले और 13 लाल पेन हैं। यदि यादृच्छिक रूप से (randomly) 3 पेन चुने जाते हैं, तो सभी पेनों के नीले होने की क्या प्रायिकता है? (दो दशमलव स्थानों तक)
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