Questions

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

It is MISSISSIPPI.

King Abdul Khalid is the largest of all the Airports.It is situated in Riyadh ,Saudhi Arabia

The Human Resource Development Ministry and the External Affairs Ministry launched an online verification portal to make the document verification process easier for students who planning to study abroad. The Central Board of Secondary Education’s (CBSE) academic repository of degrees and certificates “Parinam Manjusha” was also involved in the project of creating “eSanad”.

India's first passenger train run took place from Mumbai to Thane for around 34 kms on 16th April in the year 1853. 

That train was hauled by three steam locomotives : Sahib, Sindh and Sultan.

That train had 14 carriages, carrying around 400 passengers.

RAROC is a risk-adjusted framework for profitability measurement and profitability management. It is a tool for measuring risk-adjusted financial performance. And it provides a uniform view of profitability across businesses (Strategic Business Units / divisions). RAROC and related concepts such as RORAC and RARORAC are mainly used within (business lines of) banks and insurance companies. RAROC is defined as the ratio of risk-adjusted return to economic capital.