Latest GRE Aptitude Question SOLUTION: At a banquet, 9 women and 6 men are to be seated in a row of 15 chairs. If the entire seating arrangement is to be chosen at random, what is the probability that all of the men wil

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Previous Question: The minimal distance between any point on the sphere (x-2)^2 + (y-1)^2 + (z-3)^2 = 1 and any point on the sphere (x+3)^2 + (y-2)^2 + (z-4)^2 = 4 is (A) 0 (B) 4 (C) Sqrt(27) (D) 2(Sqrt2 + 1) (E)3(Sqrt3 – 1) Next Question: Let M be a 5*5 real matrix. Exactly four of the following five conditions on M are equivalent to each other. Which of the five conditions is equivalent to NONE of the other four? (A) For any two distinct column vectors u and v of M, the set {u, v} is linearly independent. (B) The homogeneous system Mx = 0 has only the trivial solution. (C) The system of equations M x = b has a unique solution for each real 5*1 column vector b. (D) The determinant of M is nonzero. (E) There exists a 5*5 real matrix N such that NM is the 5*5 identity matrix.

(#M40151762) GRE Numerical Ability question Probability Keep an EYE

At a banquet, 9 women and 6 men are to be seated in a row of 15 chairs. If the entire seating arrangement is to be chosen at random, what is the probability that all of the men will be seated next to each other in 6 consecutive positions?
(A) 1/(15/6)
(B) 6!/(15/6)
(C) 10!/15!
(D) 6! 9! /14!
(E) 6! 10! / 15!: Asked In GRE Aashu (9 years ago); Unsolved; Is this Puzzle helpful? (0) (0) Submit Your Solution Permutation and Combination

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Previous Question: The minimal distance between any point on the sphere (x-2)^2 + (y-1)^2 + (z-3)^2 = 1 and any point on the sphere (x+3)^2 + (y-2)^2 + (z-4)^2 = 4 is (A) 0 (B) 4 (C) Sqrt(27) (D) 2(Sqrt2 + 1) (E)3(Sqrt3 – 1) Next Question: Let M be a 5*5 real matrix. Exactly four of the following five conditions on M are equivalent to each other. Which of the five conditions is equivalent to NONE of the other four? (A) For any two distinct column vectors u and v of M, the set {u, v} is linearly independent. (B) The homogeneous system Mx = 0 has only the trivial solution. (C) The system of equations M x = b has a unique solution for each real 5*1 column vector b. (D) The determinant of M is nonzero. (E) There exists a 5*5 real matrix N such that NM is the 5*5 identity matrix.

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