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Let U = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }, A = { 1, 2, 3, 4}, B = { 2, 4, 6, 8 } and C = { 3, 4, 5, 6 } . Find (A ∪ C)′

Let U = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }, A = { 1, 2, 3, 4}, B = { 2, 4, 6, 8 } and C = { 3, 4, 5, 6 } . Find (B – C)′

Let U={1,2,3,4,5,6,7,8,9}, B={2,4,6,8} andC={3,4,5,6} Find (B-C)' .

If A={1,2,3,4}, B={2,3,4,5},C={1,3,4,5,6,7}. Find A-C and hence verify that, A-(BcapC)=(A-B) cup(A-C)

At 25^(@)C, K_(c ) for the reaction 3C_(2)H_(2(g))hArr C_(6)H_(6(g)) is 4.0. If the equilibrium concentration of C_(2)H_(2) is 0.5 mol. lit^(-1) . What is the concentration of C_(6)H_(6) ?

Find the 6th and nth term of the GP 2, 6, 18, 54,.....

Let U = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }, A = { 1, 2, 3, 4}, B = { 2, 4, 6, 8 } and C = { 3, 4, 5, 6 } . Find (A′)′

If .^(n)C_(8)=.^(n)C_(6) , then find .^(n)C_(2) .

Find the sum C_0-C_2+C_4-C_6+ ......... ,where C_r=^n C_r .

Find the value of k if ^(k^2-2k)C_9 = ^(k^2-2k)C_6

CENGAGE PUBLICATION-PERMUTATIONS AND COMBINATIONS-All Questions
  1. The number of distinct natural numbers up to a maximum of four digi...

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  2. In a three-storey building, there are four rooms on the ground floo...

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  3. Find 6C2

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  4. The number of three-digit numbers having only two consecutive digit...

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  5. Number of four-digit numbers of the form N=a b c d which satisfy fol...

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  6. Find the number of ways in which 5A^(prime)s and 6B ' s can be arrange...

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  7. If N is the number of different paths of length-12 which leads from ...

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  8. The number of nine nonzero digits such that all the digits in the fi...

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  9. Total number of words that can be formed using all letters of the w...

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  10. The total number of five digit numbers of different digits in which th...

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  11. The number of four-digit numbers that can be made with the digits 1...

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  12. Total numbers formed less than 3xx10^8 and can be formed using the d...

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  13. If all permutations of the letters in the word 'OBJECT" are arranged (...

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  14. The total number of six-digit natural numbers that can be made with...

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  15. Total number of six-digit number in which all and only odd digits a...

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  16. Among the 8! [permutations of the digits 1, 2, 3..., 8, consider tho...

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  17. The total number of ways of selecting two numbers from the set {1,2...

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  18. The total number of times, the digit 3 will be written when the int...

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  19. The total number of divisor of 480 that are of the form 4n+2,ngeq0,...

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  20. The total number of ways of selecting six coins out of 20 one-rupee ...

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