Great Problem to check your Stock skills..Pls. provide the solution asap

[ankitnikki]

Please Have a look at the great problems to check ur stock skills .....They are mentioned in the attachments.......Suggest their solutions please.

 

[alpha1]

Is this what quants do?

Looks like intermediate level statitics to me.

 

[ankitnikki]

Hey alpha1,
I appreciate ur knowledge .....I know its a small prob........but for a beginner like me.....it wud only furnish me knowledge........I request u to suggest me the solution to any of these..............I wud b very much grateful to u