This GRE test consists of permutations and combinations questions which are part of the GRE Quantitative section.
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A five-digit number is formed using digits 1, 3, 5, 7 and 9 without repeating any one of them. What is the sum of all such possible numbers?
E. None of these
In how many ways can eight directors, Vice-chairman and Chairman of a firm be seated at a round table, if the Chairman has to sit between the Vice-chairman and a director?
A. 9 X 2!
B. 9! X 2
A man has 9 frinds : 4 boys and 5 girls. In how many ways can he invite them, if there have to be exactly 3 girls in the invitees?
How many numbers can be formed from 1, 2, 3, 4, 5 (without repetition), which the digit at the unitâ€™s place must be greater than that in the tenâ€™s place?
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