In two types of stainless steel, the ratio of chromium and

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In two types of stainless steel, the ratio of chromium and steel are 2 : 11 and 5 : 21 respectively. In what proportion should the two types be mixed so that the ratio of chromium to steel in the mixed type becomes 7 : 32 ?

1. 2 : 3
2. 3 : 4
3. 1 : 2
4. 1 : 3

Correct Option: C

By Alligation Rule

=	15 − 14	=	1	=	7 − 6	=	1
	78		78		39		39

∴ Required ratio = 1 : 2