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1. #### I am looking for a study partner for naplex

by , 08-15-2010 at 11:51 PM
[QUOTE=marysa;808777]I am looking for a study partner[/QUOTE]
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2. #### Permutations And Combinations

by , 08-14-2010 at 10:30 PM
[QUOTE=suja84_ibt;205994]1. If one operation can be performed in m ways and another operation in n ways, then the two operations in succesion can be done in [b]m*n[/b] ways

2. The linear permutation of n [b]distinct[/b] objects (that is, the number of ways in which these n objects can be arranged is [b]n![/b] and the circular permutation of n distinct objects is [b](n-1)![/b] But if the clockwise and anticlockwise directions are indistinguishable then the circular permutations of ...
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Read More 3. #### Formulae and Shortcuts - making life easier!

by , 08-14-2010 at 10:17 PM
[QUOTE=suja84_ibt;205580]More formulae:

[b]PROGRESSION:

[/b]Sum of first n natural numbers: 1 +2 +3 + .... + n = [n(n+1)]/2
Sum of first n odd numbers: 1 + 3 + 5 + .... upto n terms = n^2
Sum of first n even numbers: 2 + 4 + 6 + ... upto n terms = n(n+1)
[b]
ARITHMETIC PROGRESSION[/b]

nth term of an Arithmetic progression = a + (n-1)d
Sum of n terms in an AP = s = n/2 [2a + (n-1)d]
where, a is the first term and ...
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Read More 4. #### solve these ps question

by , 08-07-2010 at 12:25 PM
Four boys picked up 30 mangoes .In how many ways can they divide them if all mangoes be identical?
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5. #### help me with this standard deviation question

by , 08-06-2010 at 09:42 PM
[QUOTE=sharma1617;808316]The fourth grade at school X is made up of 300 students who have a total weight of 21,600 pounds.
If the weight of these four graders has a normal distribution and standard deviation equals 12 pounds, approximately what percentage of the fourth graders weighs more than 84 pounds?

a 12%
b 16%
c 36%
d 48%
e 60%

need detailed explanation,,and also want to know what are bell curve questions and how it will relate ...
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