CUET · MATHS · PYQ PAPER 2023
A die is thrown again and again until three sixes are obtained. The probability of obtaining third six in sixth throw of the die is:
- A 1/23328
- B 625/23328
- C 25/36
- D 25/23328
Answer & Solution
Correct Answer
(B) 625/23328
Step-by-step Solution
Detailed explanation
\( P(\text{2 sixes in 5 throws}) = C(5, 2) \left(\frac{1}{6}\right)^2 \left(\frac{5}{6}\right)^3 = 10 \times \frac{1}{36} \times \frac{125}{216} = \frac{1250}{7776} \)…
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