I am not able to solve probability questions..What are the things that i should practice ? and where should i use combination formula? 

 

 

Dear Student,
Please find below the solution to the asked query:

$$\begin{gathered} \mathrm{First} \mathrm{of} \mathrm{all} \mathrm{you} \mathrm{should} \mathrm{revise} \mathrm{the} \mathrm{chapter} \mathrm{Permutation} \mathrm{and} \mathrm{Combinations} \\ \mathrm{along} \mathrm{with} \mathrm{questions}. \\ \mathrm{Then} \mathrm{cover} \mathrm{the} \mathrm{theory} \mathrm{of} \mathrm{probability} \mathrm{from} \mathrm{NCERT} \mathrm{or} \mathrm{from} \mathrm{our} \mathrm{study} \mathrm{material}. \\ \mathrm{Study} \mathrm{conditional} \mathrm{probability} , \mathrm{total} \mathrm{probabiltiy} \mathrm{and} \mathrm{Baye}\text{'}\mathrm{s} \mathrm{theorem} \mathrm{with} \\ \mathrm{great} \mathrm{attention} \mathrm{and} \mathrm{solve} \mathrm{as} \mathrm{many} \mathrm{problems} \mathrm{as} \mathrm{you} \mathrm{can}. \\ \mathrm{Feel} \mathrm{free} \mathrm{to} \mathrm{contact} \mathrm{us} \mathrm{in} \mathrm{case} \mathrm{of} \mathrm{any} \mathrm{problem}. \end{gathered}$$

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