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### Q & A (Topic priority)

Sir,

Pl. I wanted the topic-wise weightage of PMC. I wanted to revise as per the weightage.

Thank you!

Satish Morampudi
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There is no official weightage in JEE. However, past trends go in favour of the following topics:

Physics: Mechanics, Electricity & Magnetism
Mathematics: Calculus, Algebra
Chemistry: Physical, Organic

Hence, the priority may be given to these topics while revising. Priority only means doing them first. Other topics may be done after these are done. Note that it is not advised to start a new topic near the exam days. It makes more sense to concentrate on your strengths near the exam days rather than getting bogged down by the new topics / your weak topics.

### Sum of the coefficients in the expansion of $(x+y)^n$ ....

If the sum of the coefficients in the expansion of $(x+y)^n$ is 4096, then the greatest coefficient in the expansion is _ _ _ _ . Solution $C_0 + C_1 + C_2 + C_3 + ......................... + C_n =4096$ $\therefore 2^n = 4096 =2^{12}$ $\Rightarrow n = 12$ Greatest coefficient = ${}^{12}{C_6} = 924$