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Q)

There are 20 boxes numbered 1,2,......20. Five boxes are selected at random and are arranged in ascending order. In how many ways this can be done so that no. 10 is present in each selection and it comes in 3rd place in the arrangement.?

(A)10C2×10C2(B)9C2×10C2(C)9C2×9C2(D)19C4

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