Search found 15 matches
thanks a lot.
So can we generalize this by saying
If we have 'n' independent events the probability that all of them happening will be less than the least of the 'n' individual probabilities.
thanks
krishna 
- by krishna kumar
Fri Mar 04, 2011 10:46 pm- Forum: Data Sufficiency
- Topic: Probability
- Replies: 4
- Views: 3311
Probability
Hi , Could someone please help me to understand this problem. If Event A and Event B are independent, is the probability that both Event A and Event B will happen greater than 0.3 ? 1. Probability that A will happen is 0.25 2. Probability that B will not happen is 0.71. Thanks in advance. OA D
- by krishna kumar
Fri Mar 04, 2011 9:15 pm- Forum: Data Sufficiency
- Topic: Probability
- Replies: 4
- Views: 3311
Permutations Formula
Hi All, Can someone please help with a formula . How to find the number of permutations of 7 things taken 3 at a time where 2 are of one type and 5 are of another type. I know that the formula for finding the permutations of 7 things where 2 are of one type and 5 are of another type is 7!/ (2! * 5!)...
- by krishna kumar
Mon Feb 21, 2011 9:46 pm- Forum: Problem Solving
- Topic: Permutations Formula
- Replies: 1
- Views: 1090
Value of expression
If each expression under the square root is greater than or equal to zero what is root(x^2 - 6x + 9) + root(2 -x) + x -3 ? A. root(2 -x) B. 2x - 6 + root(2 -x) C. root(2 - x) + x - 3 D. 2x - 6 + root(x - 2) E. x + root(x - 2) [spoiler]OA A [/spoiler] My answer is B. Could anyone enlighten me. Thanks...
- by krishna kumar
Sun Dec 12, 2010 9:12 am- Forum: Problem Solving
- Topic: Value of expression
- Replies: 2
- Views: 1184
Chicken Feed
Can someone solve this please. If a farmer sells 75 of his chickens, his stock of feed will last 20 more days than planned,but if he buys 100 more chickens, he will run out of feed 15 days earlier than planned. If no chickens are sold or bought the farmer will be exactly on schedule. How many chicke...
- by krishna kumar
Sun Dec 12, 2010 2:53 am- Forum: Problem Solving
- Topic: Chicken Feed
- Replies: 2
- Views: 5382
Help anyone
Could not get this.... The table below lists monthly sales of Aveko-company (in millions of dollars) January 12 February 14 March 16 April 17 May 19 June 20 July 23 In which month did Aveko achieve the biggest percentage increase in Sales ? A. February B. March C. April D. May E. July. OA A Thanks K...
- by krishna kumar
Tue Jul 20, 2010 2:23 am- Forum: Problem Solving
- Topic: Help anyone
- Replies: 3
- Views: 1303
Tricky one
Hi ,
Could not get this...
Is A positive?
1. x^2 - 2x + A is positive for all x
2. Ax^2 + 1 is positive for all x
OA A
I am getting E .
my 2 cents worth.
Krishna Kumar
- by krishna kumar
Tue Jul 20, 2010 2:05 am- Forum: Data Sufficiency
- Topic: Tricky one
- Replies: 2
- Views: 837
Lengthy Problem
Hi, I've been unsuccessful solving this problem under 2 mins. The working out seems lengthy to me. Last year the price per share of Stock X increased by k percent and the earnings per share of Stock X increased by m percent, where k is greater than m. By what percent did the ratio of price per share...
- by krishna kumar
Sun Jun 27, 2010 10:10 am- Forum: Problem Solving
- Topic: Lengthy Problem
- Replies: 3
- Views: 1195
Range of Values
Hi, This one stumped me. If x^2 – 2 < 0, which of the following specifies all the possible values of x ? A. 0 < x < 2 B. 0 < x < root(2) C. -root(2) < x < root(2) D. -2 < x < 0 E. -2 < x < 2 The OA is C I've come to the point where x < root(2) and x < -root(2). Thanks krishna kumar
- by krishna kumar
Fri Jun 25, 2010 5:36 am- Forum: Problem Solving
- Topic: Range of Values
- Replies: 2
- Views: 4842
help needed..
Hi, Could anyone solve this ? The speed of a bicycle varies directly as the square of the weight of the rider and inversely as the amount of air in the tyre. If the volume of air in the tyre is doubled, then what would be the percentage change in the weight of the bicycle-rider to maintain same spee...
- by krishna kumar
Thu Jun 24, 2010 1:08 am- Forum: Problem Solving
- Topic: help needed..
- Replies: 2
- Views: 1344
Equations
Hi ,
Could'nt sort this one out.
For all integers x and y, the operation 'd' is defined by x 'd' y = (x+2)^2 + (y+3)^2. What is the value of integer t?
(1) t 'd' 2 = 74
(2) 2 'd' t = 80
My answer B. OA is C.
Thanks
- by krishna kumar
Mon Jun 21, 2010 2:03 am- Forum: Data Sufficiency
- Topic: Equations
- Replies: 3
- Views: 1400
inequality question
Hi,
wasn't able to solve this.
Is x > 5 ?
(1) x^2 > 25
(2) 2x + 7 > 0
the OA is C
Thanks
- by krishna kumar
Fri Jun 18, 2010 5:27 am- Forum: Data Sufficiency
- Topic: inequality question
- Replies: 4
- Views: 1243
Inequalities
Hi,
I have this problem from the Sets -(set 28 problem 5)
Is |x|< 1?
(1) |x + 1| = 2|x - 1|
(2) |x - 3| ≠0
The OA is C.
I haven't been able to figure that one out.
I figured that both 1 and 2 are not sufficient.
Could any one help.
thanks
- by krishna kumar
Tue Jun 15, 2010 4:42 am- Forum: Data Sufficiency
- Topic: Inequalities
- Replies: 4
- Views: 1377
- by krishna kumar
Sat Jun 12, 2010 1:47 am- Forum: Problem Solving
- Topic: Circles
- Replies: 2
- Views: 1169
Circles
In the xy-plane, the point (-2, -3) is the center of a circle. The point (-2, 1) lies inside the circle and the point (4, -3) lies outside the circle. If the radius r of the circle is an integer, then r = A. 6 B. 5 C. 4 D. 3 E. 2 The OA given is B. I haven't a clue to this. Could anyone help. Thanks...
- by krishna kumar
Fri Jun 11, 2010 11:10 pm- Forum: Problem Solving
- Topic: Circles
- Replies: 2
- Views: 1169