A and B are two alloys of gold and copper in the ratio 7

A and B are two alloys of gold and copper in the ratio 7 : 2 and 7:11 respectively. If equal quantities of these two alloys are melted to form a new alloy C, then the ratio of gold and copper in C is

1 kg of each mixture is taken.
A ⇒ 7 : 2 = 14 : 4

Gold =	14	; Copper =	4
	18		18

B ⇒ 7 : 11

Gold =	7	; Copper =	11
	18		18

∴ Required ratio

=		14	+	7		:		4	+	11
		18		18				18		18

= 21 : 15 = 7 : 5