Search found 38 matches
kindly explain the ans
xy+z=x(y+z)
which of the following must be true ?
1. x=0 and z=0
2. x=1 and y=1
3. y=1 and z=0
4. x=1 or y=0
5. x=1 or z=0
- by akpareek
Mon Aug 09, 2010 9:22 am- Forum: Problem Solving
- Topic: kindly explain the ans
- Replies: 5
- Views: 1210
Co-ordinate Geomatry
What is the slope of line L1 ?
1. L1 is parallel to x=3y
2. L1 passes through (3,1)
- by akpareek
Wed Aug 04, 2010 6:21 am- Forum: Data Sufficiency
- Topic: Co-ordinate Geomatry
- Replies: 4
- Views: 1141
Co-ordinate Geomatry
Is line L1 perpendicular to L2 ?
1. L1 passes through (1,2) and L2 passes through (2,1)
2. L1 is parallel to x=y and L2 is parallel to x-y+4=0
- by akpareek
Wed Aug 04, 2010 6:20 am- Forum: Data Sufficiency
- Topic: Co-ordinate Geomatry
- Replies: 3
- Views: 1040
Co-ordinate Geomatry
in the xy plane, line L passes through point (1,p). Does L have a positive slope ?
1. L passes through point (-p,13)
2. L passes through point (0,1)
- by akpareek
Wed Aug 04, 2010 6:11 am- Forum: Data Sufficiency
- Topic: Co-ordinate Geomatry
- Replies: 10
- Views: 1662
Co-ordinate Geomatry
In the xy plane, are the points (r,s) and (u,v) equidistance from the origin ?
1. r+s=1
2. u=1-r and v=1-s
- by akpareek
Wed Aug 04, 2010 6:08 am- Forum: Data Sufficiency
- Topic: Co-ordinate Geomatry
- Replies: 2
- Views: 920
Probability
A seven-digit combination lock on a safe has zero exactly three times, does not have the digit 1 at all. What is the probability that exactly 3 of its digits are odd?
(a) 21
(b) 31
(c) 61
(d) 164
(e) 169
- by akpareek
Sun Aug 01, 2010 10:57 am- Forum: Problem Solving
- Topic: Probability
- Replies: 2
- Views: 1458
Any number selected from set M multiplied by any positive number from set T will give you a negative result. Probability of selecting a -ve number from set M = 1 (all numbers are negative) Probability of selecting a +ve number from set T = 3/6 = 1/2 Thus, total probability = 1x1/2 = 1/2 Should be (...
- by akpareek
Fri Jul 30, 2010 6:07 am- Forum: Problem Solving
- Topic: Probability ( Really difficult)
- Replies: 3
- Views: 964
Probability ( Really difficult)
M = {-6, -5, -4, -3, -2}
T = {-2, -1, 0, 1, 2, 3}
If an integer is to be randomly selected from set M above and an integer is to be
randomly selected from set T above, what is the probability that the product of the two
integers will be negative?
A. 0
B. 1/3
C. 2/5
D. 1/2
E. 3/5
- by akpareek
Fri Jul 30, 2010 5:21 am- Forum: Problem Solving
- Topic: Probability ( Really difficult)
- Replies: 3
- Views: 964
Number Problem (plz help)
Can smbody explain how the ans is D
The sum of all the integers k such that –26 < k < 24 is
A. 0
B. -2
C. -25
D. -49
E. -51
- by akpareek
Fri Jul 30, 2010 5:20 am- Forum: Problem Solving
- Topic: Number Problem (plz help)
- Replies: 4
- Views: 3524
Probability ( Really difficult)
If a certain coin is flipped, the probability that the coin will land heads is 1/2. If the coin
is flipped 5 times, what is the probability that it will land heads up on the first 3 flips and
not on the last 2 flips?
A. 3/5
B. 1/2
C. 1/5
D. 1/8
E. 1/32
- by akpareek
Fri Jul 30, 2010 5:18 am- Forum: Problem Solving
- Topic: Probability ( Really difficult)
- Replies: 3
- Views: 1030
Average Problem
Each of the 30 boxes in a certain shipment weighs either 10 pounds or 20 pounds, and average (arithmetic mean) weight of the boxes in the shipment is 18 pounds. If the average weight of the boxes in the shipment is to be reduced to 14 pounds by removing some of the 20-pound boxes, how many 20-pound ...
- by akpareek
Fri Jul 30, 2010 5:14 am- Forum: Problem Solving
- Topic: Average Problem
- Replies: 5
- Views: 1735
Number Problem (plz help)
What is the value of the integer k? (1) k + 3 > 0 (2) k raise to power 4 is less than or equal to 0 A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are suffic...
- by akpareek
Fri Jul 30, 2010 5:13 am- Forum: Data Sufficiency
- Topic: Number Problem (plz help)
- Replies: 2
- Views: 990
Combination Problem(plz help)
A certain university will select 1 of 7 candidates eligible to fill a position in the mathematics department and 2 of 10 candidates eligible to fill 2 identical positions in the computer science department. If none of the candidates is eligible for a position in both departments, how many different ...
- by akpareek
Fri Jul 30, 2010 5:09 am- Forum: Problem Solving
- Topic: Combination Problem(plz help)
- Replies: 3
- Views: 1217
Probability
There are 8 marbles in a jar. 5 are red and 3 are green. If 4 marbles are selected at random from jar, what is the probability that at least one red marble and one green marble will be seleted?
A) 4/5 B) 10/11 C) 11/12 D) 12/13 E) 13/14
- by akpareek
Mon Apr 26, 2010 7:56 am- Forum: Problem Solving
- Topic: Probability
- Replies: 3
- Views: 1634
Combination question(plz explain)
Arrange A, B, C, D, E in a line. How many ways are possible such that A always comes before E ?
A) 60 B) 48 C) 36 D)24 E) 18
- by akpareek
Mon Apr 26, 2010 7:52 am- Forum: Problem Solving
- Topic: Combination question(plz explain)
- Replies: 4
- Views: 1314