Search found 62 matches
Answer is option 4 (i.e) 400
x+43+17+12+3 = 100
x+75 = 100
x = 25
75% of them are delayed which is equalt to 1200
75/100 * x = 1200
x = 1600
25% are on time
25/100 * 1600 = 400
- by kishore
Sat Oct 10, 2009 1:52 pm- Forum: Problem Solving
- Topic: Planes
- Replies: 1
- Views: 993
On one side of a coin there is the number 0 and on the other side the number 1. What is the probability that the sum of three coin tosses will be 2? No of ways sum of three coin tosses will be 2 are 3 011 101 110 Probable totals of three coin tosses will be 8 000 111 010 001 100 110 101 011 Probabil...
- by kishore
Sun Feb 01, 2009 1:21 pm- Forum: Problem Solving
- Topic: Probability: Total of 3 coin flips
- Replies: 2
- Views: 1341
If two balls are to be choosen from 3 red balls and 2 white balls, what is the probability of picking at least one white ball?
Answer: probability of picking at least one white ball is
1 - (probability of picking only red ball)
1 - ( 3C2/5C2) = 1- (3/10) = 7/10
- by kishore
Sun Dec 28, 2008 8:39 pm- Forum: Problem Solving
- Topic: What is the probability of picking at least one white ball
- Replies: 4
- Views: 19523
- by kishore
Sun Dec 28, 2008 8:35 pm- Forum: Problem Solving
- Topic: password codes
- Replies: 8
- Views: 1864
password codes
A software program is designed to generate password codes using alphabet from A to J, how many 4-alphabet password codes can the program generate? (please note: the alphabets are not allowed to repeat itself.)? Answer: A to J there are 10 aplhabets. Each password is 4 digits length. Every time you c...
- by kishore
Sun Dec 28, 2008 7:50 pm- Forum: Problem Solving
- Topic: password codes
- Replies: 8
- Views: 1864
How many ways can 3 pieces of candy given out to 4 kids ?
How many ways can 3 pieces of candy given out to 4 kids ?
4C3 = 4!/1! * 3! = 4 ways
Alternative Explanation:
A, B, C, D are the Kids and 3 candies can be distributed among them as
ABC
ABD
ACD
BCD
Therefore it is 4 ways.
- by kishore
Sun Dec 28, 2008 7:36 pm- Forum: Problem Solving
- Topic: candy
- Replies: 4
- Views: 1253
The number of stamps that Kaye and Alberto had were in the ratio 5:3 respectively. After Kaye gave Alberto 10 of her stamps, the ratio of the number Kaye had to the number Alberto had was 7:5. As a result of this gift, Kaye had how many more stamps than Alberto? C) 40 K:A = 5:3 => K = 5x and A = 3x ...
- by kishore
Wed Jul 16, 2008 7:17 pm- Forum: Problem Solving
- Topic: GMATPrep Stamps
- Replies: 24
- Views: 10804
Answer) E = |X|/X If X not equal to Zero, sqrt(X^2)/ X If X = -1 sqrt(X^2)/ X = sqrt ( -1 ^ 2)/ -1 = sqrt(1)/-1 = 1/-1 = -1 If X = 1 sqrt(X^2)/ X = sqrt ( 1 ^ 2)/ 1 = sqrt(1)/1 = 1/1 = 1 So, X can be -1 or + 1 look at the answers if x = -1 => |x|/x = |-1|/-1 = 1/-1 = -1 if x = 1 => |x|/x = |1|/1 = 1...
- by kishore
Mon Jul 14, 2008 8:25 pm- Forum: Problem Solving
- Topic: GMAT Prep - Number Properties
- Replies: 4
- Views: 1681
In Company X, 30 percent of the employees live over ten miles from work and 60 percent of the employees who live over ten miles from work are in car pools. If 40 percent of the employees of Company X are in car pools, what percent of the employees of Company X live ten miles or less from work and ar...
- by kishore
Mon Jul 14, 2008 8:11 pm- Forum: Problem Solving
- Topic: simple but tricky
- Replies: 3
- Views: 4034
The volume of a box with a square base is 54 cubic centimeters. If the height of the box is twice the width of the base, what is the height, in centimeters? (D) 6 Box is cube volume of cube = L * B * H Since, base of the box is square L = B From question, we know that H = 2 * B If L = B = x => H = 2...
- by kishore
Mon Jul 14, 2008 7:55 pm- Forum: Problem Solving
- Topic: volume
- Replies: 2
- Views: 5440
If y > 0, which of the following is equal to sq.48y^3
Answer:
(A) 4y sq. rt. 3y
sqrt(48 * y^3)
= sqrt(16 * 3 * y ^2 * y)
= sqrt(16) * sqrt(3) * sqrt(y ^2) * sqrt(y)
= 4 * sqrt(3) * y * sqrt(y)
= 4y sqrt(3*y)
- by kishore
Mon Jul 14, 2008 7:46 pm- Forum: Problem Solving
- Topic: square roots
- Replies: 1
- Views: 1618
Ans) 1/15
Total number of workers = Josua + Jose + 4 = 6
2 people will be interviewed from 6
=> Total outcomes = 6C2
=> Possible outcomes that Josua and Jose are selected = 2C2
Probability = 2C2/6C2 = 1/15
- by kishore
Sun Jun 22, 2008 3:49 pm- Forum: Problem Solving
- Topic: permutation? probability
- Replies: 2
- Views: 1407
I guess, right answer is:
(C) Because of many young recruits to the United States work force who are so poorly educated and trained
- by kishore
Sat Jun 21, 2008 10:14 pm- Forum: Sentence Correction
- Topic: young recruiters..
- Replies: 7
- Views: 1933
Answer:
(D) Clara Schumann has been a child prodigy, and she
Reason: Pro-Noun should be followed by Noun but not reverse
- by kishore
Sat Jun 21, 2008 10:04 pm- Forum: Sentence Correction
- Topic: Clara Schumann..
- Replies: 4
- Views: 1932
No.....it is
nCr = n!/((n-r)! * r!)
5C2 = 5!/(3! * 2!)
XC2 = X!/((X-2)! * 2!)
Substitute X = 6
6C2 = 6!/((6-2)! * 2!)
- by kishore
Sat Jun 21, 2008 8:51 pm- Forum: Problem Solving
- Topic: Combinatorics
- Replies: 4
- Views: 1554