WBJEE · Maths · Permutation Combination
If the letters of the word 'PROBABILITY' are written down at random in a row, then probability that two B's are together, is
- A \(\frac{2}{11}\)
- B \(\frac{10}{11}\)
- C \(\frac{3}{11}\)
- D \(\frac{5}{11}\)
Answer & Solution
Correct Answer
(A) \(\frac{2}{11}\)
Step-by-step Solution
Detailed explanation
Total number of ways in which the letters of the word 'PROBABILITY can be amanged in a row \(=\frac{11!}{2!2 !}\) Number of ways in which two B's are togother \(=\frac{10!}{2!}\) \(\therefore\) Required probability…
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