1.

1). 7 : 52). 6 : 53). 7 : 44). 1 : 1

Answer»

Let the amounts of FIRST and second mixture taken be M and N, respectively.

⇒ Amount of milk in first mixture = 6M/11

⇒ Amount of water in first mixture = 5M/11

⇒ Amount of milk in second mixture = 7N/11

⇒ Amount of water in second mixture = 4N/11

Amount of final mixture = (M + N)

⇒ Amount of milk in final mixture = 7(M + N)/12

⇒ 6M/11 + 7N/11 = 7(M + N)/12

⇒ 72M + 84N = 77M + 77N

⇒ 5M = 7N

⇒ M/N = 7/5

∴ Ratio should be 7 : 5



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