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Find the number of ways in which two sma...

Find the number of ways in which two small squares can be selected on the normal chessboard if they are not in same row or same column.

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The correct Answer is:
`(.^(m)C_(r).^(n)C_(r) r !)/(.^(mn)C_(r))`
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FIITJEE-PROBABILITY-ASSIGNMENT PROBLEMS (SUBJECTIVE) Level -II
  1. Two friends visit a restaurant randomly during 5 pm to 6 pm . Among...

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  2. Find the number of ways in which two small squares can be selected on ...

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  3. If the probability that two queens, placed at random on a chess board,...

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  4. An unbiased dike, with faces numbered 1,2,3,4,5,6, is thrown n time...

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  5. Suppoe a simple consist of the integers 1,2,….2n, the probability of c...

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  6. A bag contains n white and n red balls. Pairs of balls are drawn witho...

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  7. If p,q,r and s are the probabilities of raining at four different plac...

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  8. From 4m+1 tickets numbered as 1,2 ,….4m+1…. Three tickets are chosen a...

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  9. Two integers x and y are chosen (with replacement) out of the set {0,1...

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  10. There are two red, two blue, two white, and certain number (greater ...

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  11. Suppose f(x)=x^(3)+ax^2+bx+c.a,b,c are chosen respectively by throwing...

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  12. 8n players P(1),P(2),P(3)……..P(8n) play a knock out tournament. It is ...

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  13. A bag 'A' contains 2 white and 3 red balls, a beg 'B' contains 4 white...

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  14. . A bag contains n white, n black balls. Pair of balls are drawn witho...

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  15. Eight players P1, P2, P3, ...........P8, play a knock out tournament....

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  16. Five different digits from the set of numbers {1, 2, 3, 4, 5, 6, 7} ar...

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  17. Fourteen numbered balls (i.e.1,2,3…..,14) are divided in 3 groups rand...

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