Concert DS

Each person who attended a certain concert paid the same price for a ticket. How many people attended the concert? A) If the ticket price had been $6 more and 100 fewer people had attended the concert, the total revenues from ticket sales would have been the same. B) If the ticket price had been $6 ...

If x is a positive integer, what's the LCM of x, 6 and 9? (1) The LCM of x and 6 is 30. We can attack this statement by brute force or by using our knowledge of principles. If the LCM of x and 6 is 30, then x could be 5, 10, 15 or 30 . If you try out all 4 of those possibilities, you'll get a LCM o...

C is correct D) Since youngsters who read voraciously are more likely to have defective vision than youngsters who do not read very much, it follows that children who do not like to read usually have perfect vision. What is particular about the bold part of choice D? I an trying to find a strategy ...

Flawed Resoning Pattern

Insurance industry statistics demonstrate that cars with alarms or other antitheft devices are more likely to be stolen or broken into than cars without such devices or alarms. Therefore antitheft devices do not protect cars against thieves. The pattern of flawed reasoning in the argument above is m...

History Book

A history book written hundreds of years ago contains several inconsistencies. Some scholars argue that because the book contains inconsistencies, the author must have been getting information from more than one source. The conclusion cited does not follow unless: A) authors generally try to reconci...

Can we combine the two statements in the following way?

St A:
a (a^2-1)<0
a (a-1) (a+1)<0
Multiplying both sides by -1, we get
a (1-a) (a+1)>0 ---- I
St B:
(1-a) (1+a)>0
So, equation I becomes:
a>0
Hence answer C.

Is this method right?

Thanks in advance!

a combination problem is one in which order does not matter.. here the ordering is imp so it will be permutation problem The order matters as we need to have boys and girls on alternate seats. But here the order in which 3 boys will seat among themselves does not matter. So is the case for 3 girls....

The following equation can always be used for triple-overlapping set : True # of objects = (total # in group 1) + (total # in group 2) + (total # in group 3) - (# in exactly 2 groups) - 2(# in all 3 groups) or True # of objects = (total in exactly 1 group) + (total in exactly 2 groups) + (total in ...