CAT Questions

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Let the amount collected be 'A'
Then, from the given conditions,
A x 110/100 x 90/100 = 7920
A x 0.99 = 7920
A = 7920/0.99
=> 8000

Now, take percentage of milk and applying mixture rule

25          100

       50

50            25  = 2 : 1

Hence required answer =  1/3 or 33.33%

The western education system was introduced in India by Lord William Bentinck. He is also responsible for a large no of social reforms like the abolition of Sati, infanticide and child marriage.

Because the refractive index of glass is highest, light travels slowly in Glass. 

We know that the speed of light depends on the refraction index. The higher the index of refraction is, the slower the speed of light is.

R.I of air and vacuum = 0 (air is a teeny bit more but can be taken as 0)
R.I of water = 1.33
R.I of glass = 1.4.

Hence, Light travels slowest in Glass.

3X + 4y = 240
by substitute through options 48 is correct

In networking, the Open Systems Interconnection is commonly called as OSI model. It has a 7 layer architecture for the communication.

In OSI network architecture, the routing is performed by network layer which is layer number 3 with the help of intermediate routers.