Palak Varma posted an Question
June 19, 2021 • 15:32 pm 30 points
  • IIT JAM
  • Biotechnology (BT)

Please explain: in how many ways can one write the elements 1, 2, 3, 4 in a sequence xq, x2, xg x, with x, # (c) (a) 9 11 unc (b) (d) 12 10 com i vi?

Please Explain: In how many ways can one write the elements 1, 2, 3, 4 in a sequence Xq, X2, Xg X, With x, # (C) (A) 9 11 unc (B) (D) 12 10 Com i Vi?

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    Deepak singh 1 best-answer

    Refer attached option a is correct

    cropped2160441049776662231.jpg
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    can you explain in a easy manner

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    this is theoretical question . For X1 - (can't choose 1 , possible values are 2,3and 4 . So total 3 ) . Now for X2 ( We can't choose 2 , left with 2 possible values and do also replace by X1 .so total 3 ) . Now for X3 (can't choose 3, and X1 and X2 are already fixed .So total- 1 ) . similarly for x4 (it will be unique , so total is 1 ) . So 3×3×1×1=9

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