Questions

In the given puzzle,

The logic is in the format of lets say, a/b

In that case b doesn't matter, because

2/2 = 1,

6/5 = 6/2 = 3,

10/11 = 10/2 = 5

This means that equation is a/2

So 16/19 is equal 16/2 = 8.

At least one black can be chosen in two ways from each box:
Now, probability of choosing at least one black ball from first box 

= 1/2 × [ (2C1× 2C1)/4C2 + 2C2/ 4C2 ]= 5/12

Probability of choosing at least one black ball from 2nd box
= 1/2 × [(4C1×12C1)/16C2 + 4C2/ 16C2] = 9/40

Final probability

= 5/12 + 9/40 = (50 + 27)/120 = 77/120

Ecology is the branch of science which deals with the study of Ecosystem (relation between the Organisms and their Environment.)

Various designations have been specified by the President for the different Union Territories:

(i) Chief Commissioner for Chandigarh

(ii) Administrator for

     (a) Lakshadweep and

     (b) Dadra and Nagar Haveil

(iii) Lieutenant Governor for 

    (a) Andaman and Nicobar Islands

    (b) Delhi

    (c) Daman and Diu and

    (d) Pandicherry