question_answer

How many kilograms of tea at \[50\] per kg should be mixed with \[35\,\,kg\] of tea costing \[Rs.\,\,60\] per kg so as to sell the mixture at \[Rs.\,\,57\] per kg without gaining or losing anything in the transaction?

A) \[5\,\,kg\]                                  

B) \[7\,\,kg\]                      

C) \[25\,\,kg\]         

D)        \[15\,\,kg\]