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Qn #1744
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Qn #1545
There are 8 students appearing in an examination of which 3 have to appear in Mathematics paper and the remaining 5 in different subjects. Then, the number of ways they can be made to sit in a row, if the candidates in Mathematics cannot sit next to each other is
Qn #1533
The number of ways to arrange the letters of the English alphabet, so that there are exactly 5 letters between a and b, is: