[Official] Quant Thread for 2015!

MBA CAT 2024
2161

In a school there are total of 50 students in class X, who are divided into three sections A,B and C. Section A and B have equal no. of students. All the students of class wrote a test. The average marks obtained by the students of section A and B together is 52.5. The average marks obtained by the students of A and C is 60. The average marks obtained by the students of B and C is 70. The average marks obtained by the students of A,B, and C together is 60. How many students are there in section C.

a. 10   b.20  c. 15  d. Can't Determined

APPROACH PLEASE.....

2162

It is getting boring today. Old people/colleagues/friends, how are you doing ? Hows the prep. ? 😃

2163

Find the remainder

65^37^80/39

Can I apply, Euler to 37^80/39 separately?

That would give Remainder = 1

So 65^1/39, R= 26

Is this approach right?

2164

Two men M and N started walking towards each other simultaneously from two places F and G respectively which is 50KM apart.they meet after 5 hours.after their meet M reduced his speed by 1KMPH and N increased by 1KMPH.that arrived at G and F simultaneously (same time).what is the initial speed of M?

2165

A and B along with 12 other sit in circle.all 14 r randomly arranged.wt is the probability of occuring exactly 7 members between A and B?

Post the solution, too.!

2166

If a,b,c are three positive real numbers then the minimum value of the expression (b+c)/a + (c+a)/b + (a+b)\c is

1


2 

3 

6


2167

http://imgur.com/u8cCaqv

2168

There are N students in a class. They are given the task of finding the average of first N natural nos and each of them left a different number and found the average of the remaining nos. The average of the averages obtained by the students was 21. Find N

a) 39 b)40 c)41 d)38

Can someone help with the correct approach

2169

Can neone share the study material to ace pnc concepts??

2170

How many 7 letter words can be constructed using the 26 letter of the alphabet series if each word contains exactly 3 vowels ? ( repetition is allowed )

2171

The speed of a railway engine is 42 kmph when no compartment is attached, and the reduction in speed is directly proportional to the square root of the number of compartments attached. If the speed of the train carried by this engine is 24 kmph when 9 compartments are attached, the maximum number of compartments that can be carried by the engine is?

2172

Let a, b, c be distinct digits. Consider a two-digit number 'ab' and a three-digit number 'ccb', both defined under the usual decimal number system, if (ab)2 = ccb > 300, then the value of b is?

2173

where can i get free and good mocks?

2174

Two alarm clocks ring their alarms at regular intervals of 50 seconds and 48 seconds. If they first beep together at 12 noon, at what time will they beep again ? 

For questions similar to the one above, how do we decide whether we need to take LCM or HCF ?

2175

Let a, b, c > 0. If 1/a , 1/b and 1/c are in arithmetic progression, and if \(a^2 + b^2 , b^2 + c^2 , c^2 + a^2 \) are in geometric progression, then

i) a=b=c. ii) a>b>c

iii) a

2176

Hi Puys,

Anyone here had given CETking mock cats?Is it good?

2177

A truck travelling at 70 km/hr uses 30% more diesel to travel a certain distance than it does when it travels at a speed of 50 km/hr. If the truck can travel 19.5 km/L of diesel at 50 km/hr, how far can the truck travel on 10 L of diesel at a speed of 70 km/hr?

2178

In how many ways 5 boys and 6 girls be seated in a row such that Walter White, one of the boys, is seated at one of the extreme ends and no two boys are adjacent to each other?

2179

how many zeros will be there at the end of the expression (2!)^2!+(4!)^4!+(8!)^8!+(9!)^9!+(10!)^10!+(11!)^11!?

Answer 1

Approach pls.. 

2180

Mr A is offered a contract with a startup for 2yrs .the agreed payment is a payment of rs 10 lacs and company stock worth rs X. After 16 months he leaves the project and gets a remuneration of rs. 5.2 lakhs and comnay stock worh rs. X. Value of x?