Search found 68 matches
answer is C...watever has been stated by cjb is correct but 1 thing. wen u take a negative value in a mod first we need to consider the valid values of x. here for neg val. of |3x-7| we need to find valid values for x... 3x-7 < 0....coz we ant this to be negative. hence x<7/3 are the set of valid va...
- by ontopofit
Thu Feb 05, 2009 10:08 am- Forum: Data Sufficiency
- Topic: Inequality 9
- Replies: 9
- Views: 2012
yes aroon....ur right.
thats why 1-none will not give the probability of 5B's.
instead it is
(1-NB)^5.
hence D.
- by ontopofit
Mon Feb 02, 2009 10:59 am- Forum: Problem Solving
- Topic: Probability
- Replies: 9
- Views: 3010
- by ontopofit
Mon Feb 02, 2009 10:48 am- Forum: Problem Solving
- Topic: numbers between 1-100
- Replies: 3
- Views: 1209
1) /x > y ;this tells the answer if x was a +ve integer.but it can be a fration. insuff
2) x^3 > y ; x > y for a fraction but not for an integer; insuff
combining we get that x>y whether a fration or an integer.
ans C
- by ontopofit
Mon Feb 02, 2009 6:34 am- Forum: Data Sufficiency
- Topic: what's the easiest way to solve this ?
- Replies: 3
- Views: 1115
now use ur calculator to find out this
i guess if the denominator's factors consist of 2,3 and 7 only are non-terminating.
please cofirm.not very sure.
- by ontopofit
Mon Feb 02, 2009 6:03 am- Forum: Problem Solving
- Topic: terminating decimal
- Replies: 14
- Views: 3275
- by ontopofit
Mon Feb 02, 2009 4:02 am- Forum: Problem Solving
- Topic: side of square
- Replies: 3
- Views: 1246
side of square
The sides of a square region, measured to the nearest centimeters, are 6 centimeters long.
The least possible value of the actual area of the square region is
A. 36.00 sq cm
B. 35.00 sq cm
C. 33.75 sq cm
D. 30.25 sq cm
E. 25.00 sq cm
- by ontopofit
Mon Feb 02, 2009 3:28 am- Forum: Problem Solving
- Topic: side of square
- Replies: 3
- Views: 1246
Good one
One kilogram of a certain coffee blend consists of x kilogram of type I coffee and y kilogram of type II coffee. The cost of the blend is C dollars per kilogram, where C = 6.5x + 8.5y. Is x < 0.8?
(1) y > 0.15
(2) C >=7.30
- by ontopofit
Mon Feb 02, 2009 3:22 am- Forum: Data Sufficiency
- Topic: Good one
- Replies: 5
- Views: 1713
IMO 54 we shud form diff sets of number summing up to 16 we start from 8......also the arrow can hit the same number twice 871 862 853 844.......so we have 4*3! ways with this taking 7 now we shud make sure that we dont have to include 8 this time 772 763 754.......3*3! ways taking 6 (not 7 or 8) 66...
- by ontopofit
Sun Feb 01, 2009 11:42 pm- Forum: Problem Solving
- Topic: roulette
- Replies: 11
- Views: 2054
- by ontopofit
Sun Feb 01, 2009 11:31 pm- Forum: Problem Solving
- Topic: Shipment
- Replies: 6
- Views: 1523
yes IMO D.
1) tells there are 5 marbles in which 3 are blue;suff
2) tells the same thing that out of 5 2 are not blue;suff
- by ontopofit
Sun Feb 01, 2009 11:02 pm- Forum: Problem Solving
- Topic: Probability
- Replies: 9
- Views: 3010
IMO A
statement 1) the pt lies on x=-1, any pt on x=-1 will be equidistant from both the pts.
statement 2) the pt. can be anywhere on the line y=-3 (1,-3;2,-3;3,-3) so u cant say if it is closer to A or B.
- by ontopofit
Sun Feb 01, 2009 10:57 pm- Forum: Data Sufficiency
- Topic: coordinate s.
- Replies: 3
- Views: 1271
in 60 let distance b/w PS = x then PR = x/3 and PM = x/2 statement 1) M=1.5 so, x/2- x/3 = 1.5, x=9,and P=-3;hence suff statement 2) RS = 6 = 2x/3 so x=9, P=-3;hence suff. D in 69 I was wrong and did it in a hurry, its E statement 1) C<5,if but P is not given so u cannot determine whether D is <>15....
- by ontopofit
Sun Feb 01, 2009 10:48 pm- Forum: Data Sufficiency
- Topic: easy but tricky
- Replies: 3
- Views: 1411
- by ontopofit
Sun Feb 01, 2009 8:34 pm- Forum: Data Sufficiency
- Topic: easy but tricky
- Replies: 3
- Views: 1411
- by ontopofit
Sun Feb 01, 2009 1:41 am- Forum: Data Sufficiency
- Topic: another DS problem
- Replies: 2
- Views: 1253