I Googled for a solution online
Solution 1: dell.com support requires owner ship proof and i don't have it.
Solution 2:www.dellpasswords.com website seems to have the password, and i will try that.
Jan 18, 2014 - HDD password for Dell Inspiron 15 N5050
Dell Inspiron 15 N5050 BIOS Password:
I bought the Bios password from http://dellpasswords.com/
and received it with 5 minutes,
the password worked & the motherboard is unlocked,
It seems to me that I now need the hard drive password,
wasn't expecting that .
Dell Inspiron 15 N5050 Hard drive Password: or