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CBSE Class 11-science Answered

permutation question
Asked by Kirandoon | 15 Jan, 2009, 05:59: PM
answered-by-expert Expert Answer

since the alphabets comes in the start and we have two of them so they can be arranged in 2 ways.

now four digits can be arranged in (4!) ways.

so total no. of plates that can be made without duplication = 2*(4!)

Answered by | 22 Jan, 2009, 10:12: AM

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