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The total number of six digit number x1 x2 x3 x4 x5 x6 have the property that x1 < x2 ≤ x3 < x4 < x5 ≤ x6 is equal to –

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The total number of six digit number x1 x2 x3 x4 x5 x6 have the property that 

 x1 < x2 ≤ x3 < x4 < x5 ≤ x6 is equal to – 

(A) 10C6 

(B) 12C6 

(C) 11C6 

(D) None 

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1 Answer

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Best answer

Correct option (C) 11C6

Explanation: 

x1 < x2 ≤ x3 < x4 < x5 ≤ x6 gives rise to the following four cases 

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