Comments on: cannot get the answer with those GRE questions!? http://the-gre.com/cannot-get-the-answer-with-those-gre-questions.html Sun, 05 Feb 2012 00:25:32 -0600 http://wordpress.org/?v=2.8 hourly 1 By: black_knight15_au http://the-gre.com/cannot-get-the-answer-with-those-gre-questions.html/comment-page-1#comment-605 black_knight15_au Sat, 12 Sep 2009 19:47:08 +0000 http://the-gre.com/cannot-get-the-answer-with-those-gre-questions.html#comment-605 1. Sun + Vc and 2 boys ways = 1 x 14 x 12 x 11 = 1848 2. 2x{2 x 4x4x4} + 3 x{2x2x4x4} = 448 (leaving out a different question each time) 3. 9 x 9 x 8 x7 x6 (no zero in first place) 4. unrestricted total - together 15! - 2!x14! (treat as one unit which can be arranged in 2! ways) = 15 x 14! - 2 x 14! = 13 x 14! 5. 5 x 7! =25200 6. must end in 2,5 or 0 can't start with 0 4x5x5x5x3 = 1500 1. Sun + Vc and 2 boys
ways = 1 x 14 x 12 x 11 = 1848

2. 2x{2 x 4×4x4} + 3 x{2×2x4×4} = 448 (leaving out a different question each time)

3. 9 x 9 x 8 x7 x6 (no zero in first place)

4. unrestricted total – together
15! – 2!x14! (treat as one unit which can be arranged in 2! ways)
= 15 x 14! – 2 x 14!
= 13 x 14!

5. 5 x 7! =25200

6. must end in 2,5 or 0
can’t start with 0
4×5x5×5x3 = 1500

]]> By: Ξlectronegative™дtif® http://the-gre.com/cannot-get-the-answer-with-those-gre-questions.html/comment-page-1#comment-606 Ξlectronegative™дtif® Sat, 12 Sep 2009 19:47:08 +0000 http://the-gre.com/cannot-get-the-answer-with-those-gre-questions.html#comment-606 its all high school mathematics. refer to maths & stats by chitale joshi. its all high school mathematics.
refer to maths & stats by chitale joshi.

]]> By: abc http://the-gre.com/cannot-get-the-answer-with-those-gre-questions.html/comment-page-1#comment-607 abc Sat, 12 Sep 2009 19:47:08 +0000 http://the-gre.com/cannot-get-the-answer-with-those-gre-questions.html#comment-607 i know how to do all of this. but i can't explain here as i am running out of time. You can email them to me. I have bachelor degree in math. They are very easy and deal with probability stuff material. i know how to do all of this. but i can’t explain here as i am running out of time. You can email them to me. I have bachelor degree in math. They are very easy and deal with probability stuff material.

]]> By: Bijay k http://the-gre.com/cannot-get-the-answer-with-those-gre-questions.html/comment-page-1#comment-608 Bijay k Sat, 12 Sep 2009 19:47:08 +0000 http://the-gre.com/cannot-get-the-answer-with-those-gre-questions.html#comment-608 Pl ask one question at a time. For q1, there are 15 girls and 12 boys Since one girl Sunita hs to be the captain, there are 14 girls left to be choosen as vice captaion, i.e in 14 ways. For boys Captain be choosen in 12 ways. After choosing a captain, 11 boys are left. hence, a vice captain can be choosen in 11 ways. Therefore, from the lot 2girls and 2 boys can be choosen in 14x 12x 11= 1848 ways. Pl ask one question at a time.
For q1,

there are 15 girls and 12 boys
Since one girl Sunita hs to be the captain, there are 14 girls left to be choosen as vice captaion, i.e in 14 ways.

For boys
Captain be choosen in 12 ways.
After choosing a captain, 11 boys are left. hence, a vice captain can be choosen in 11 ways.

Therefore, from the lot 2girls and 2 boys can be choosen in 14x 12x 11= 1848 ways.

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