Thanks Mr fantastic for the answer , but i need some steps so that i can understand how to solve such problems regarding Maximum likelihood .the steps which i have put in the prev post are the steps which i have sort from google and the books which i am using but dont know if the steps which i have put int he prev post are correct or no .
The question is a question asked i the prev years question paper which i am trying to solve by my self .
Need ur guidance and support in this . Thank you