Mathematics · Probability

एक टॉर्च में 8 बैटरियां हैं जिनमें से 3 खराब (मृत) हैं। यदि बिना प्रतिस्थापन के यादृच्छिक रूप से दो बैटरियां चुनी जाती हैं और उनका परीक्षण किया जाता है, तो दोनों के खराब होने की प्रायिकता क्या है?

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