Pl ans Q4 (multi answer type)
Pl ans Q4 (multi answer type) 4. The number of ways of arranging seven persons (having A,B,C and D among them) in a row so that A,B,C and D are always in order (not necessarily together) is a) 210 b) 5040

Dear student,

The number of ways of arranging ABCD is 4!.For each arrangement of ABCD, the number of ways of arranging 7 persons is same. Hence the required number is 7!/4!.

regards,

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