CUET · MATHS · PYQ PAPER 2025
The probability that it will rain on any particular day is \(50 \%\). The probability that it rains only on the first 4 days of the week is :
- A \(\frac{1}{64}\)
- B \(\frac{1}{128}\)
- C \(\frac{1}{16}\)
- D \(\frac{1}{8}\)
Answer & Solution
Correct Answer
(B) \(\frac{1}{128}\)
Step-by-step Solution
Detailed explanation
\( P(\text{rain}) = \frac{1}{2} \) \( P(\text{no rain}) = 1 - \frac{1}{2} = \frac{1}{2} \) \( P(\text{rains only on first 4 days}) = P(\text{rain})^4 \times P(\text{no rain})^3 \)…
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