An Urn contains ‘m’ white and ‘n’ black balls. All the balls except for one ball, are…

Mathematics · JEE Main · NTA Exams — Statistics and Probability

1. \(\frac{m}{m+n}\)
2. \(\frac{\mathrm{n}}{\mathrm{~m}+\mathrm{n}}\)
3. \(\frac{1}{(m+n)!}\)
4. \(\frac{\mathrm{mn}}{(\mathrm{~m}+\mathrm{n})!}\)

Answer

(A) m m+n

Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.

Related practice questions

• The probability that an event A happens in one trial of an experiment is 0.4. Three independent trials of the…
• Three of the six vertices of a regular hexagon are chosen at random. The probability that the triangle with…
• One bag contains 5 white and 4 black balls. Another bag contains 7 white and 9 black balls. A ball is…
• In an experiment with 15 observations on x, the following results were available. x^ 2 =2830, x=170 One…
• The A.M. of n observations is M. If the sum of n–4 observations is a, then the mean of remaining 4…
• Five horses are in race. Mr. A selects two horses at random and bets on them. The probability that Mr. A…
• The standard deviation of a variable x is 10. Then the standard deviation of 50 + 5 x is:
• A determinant is chosen at random from the set of all determinants of order 2 with elements 0 or 1 only. The…

More Statistics and Probability questions · Browse all practice questions