TS EAMCET · Maths · Probability
If 4 letters are selected at random from the letters of the word PROBABILITY, then the probability of getting a combination of letters in which atleast one letter is repeated is
- A \(\frac{43}{170}\)
- B \(\frac{19}{61}\)
- C \(\frac{57}{184}\)
- D \(\frac{29}{155}\)
Answer & Solution
Correct Answer
(B) \(\frac{19}{61}\)
Step-by-step Solution
Detailed explanation
\(\begin{array}{lllll} \mathrm{P}-1 & \mathrm{O}-1 & \mathrm{~A}-1 & \mathrm{~T}-1 & \mathrm{~L}-1 \\ \mathrm{R}-1 & \mathrm{~B}-2 & \mathrm{I}-2 & \mathrm{Y}-1 & \end{array}\) The following cases arise when we choose 4 letters from the given word Case 1: 2 letters are…
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