Question

The average age of 25 boys in a class decreases by 6 months when a new boy takes the place of a 29 year old boy . Find out the age of new boy .

Answer 1

$\huge{\boxed{\mathcal\pink{\fcolorbox{red}{blue}{..!!Hello Dear!!...}}}}$$\huge {\mathcal{\blue{A}\red{ns}\purple{wer}\green{!!!!!!!..}}}$

$total \: age \: decreased \: \\ = 25 \times \frac{1}{2} year \: \\ = 12.5 \\ therefore \\ age \: of \: new \: boy \: will \: be \\ = 20 - 12.5 \\ = 7.5 \: year \\ hence \: 7.5 \: is \: the \: answer$

Hope it helped.... plz mark as brianliest

STAy HoME STAy SAfE...