Question
Download Solution PDFएक निष्पक्ष सिक्का तब तक उछाला जाता है जब तक कि लगातार दो चित्त नहीं आ जाते। इसकी क्या प्रायिकता है कि आवश्यक उछालों की संख्या 6 से कम है?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFव्याख्या:
एक निष्पक्ष सिक्का तब तक उछाला जाता है जब तक कि लगातार दो चित्त नहीं आ जाते।
तब,
P (आवश्यक उछालों की संख्या 6 से कम है) = P(HH) + P(THH) + P(TTHH) + P(TTTHH)
= \((\frac{1}{2})^2+(\frac{1}{2})^3+(\frac{1}{2})^4+(\frac{1}{2})^5\)
= \(\frac{(\frac{1}{2})^2[ 1 -( \frac{1}{2})^4}{1-\frac{1}{2}}\)
= \(\frac{\frac{1}{4}[1-\frac{1}{16}]}{\frac{1}{2}}\)
= \(\frac{1}{4}\times\frac{15}{16}\times\frac{2}{1} = \frac{15}{32}\)
∴ विकल्प (b) सही है।
Last updated on May 30, 2025
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