• question_answer There are 10 girls and 8 boys in a classroom including Mr Ravi, Ms Rani and Ms Radha. A list of speakers consisting of 8 girls and 6 boys has to be prepared Mr Ravi refuses to speak. If Mr Ravi refuses to speak, if Ms Rani is a speaker. The number of ways the list can be prepared is A)  202                             B)  308   C)  567                             D)  952

10 girls and 8 boys (Selected 8 girls and 6 boys) Mr Ravi refuses to speak, if Ms Rani is a speaker. Mrs Rani refuses to speak, if Ms Radha is a speaker. Let       $=-0.25\times {{10}^{-3}}\,Wb$ Mr Ravi is a speaker $e=-\frac{\Delta \phi }{\Delta t}$Ms Rani is a speaker  $=\frac{0.25\times {{10}^{-3}}Wb}{0.05\,s}=5\times {{10}^{-3}}V$ Ms Radha is a speaker Set satisfying the given condition is represented in the Venn diagram $=100\,\left( \frac{\Delta \phi }{\Delta t} \right)$ Number of ways of preparing the list $=5\times {{10}^{-3}}\times 100=0.5\,\,V$ $R=v\sqrt{\frac{2h}{g}}$
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