Correct Answer - Option 1 : 39 : 31
Given:
Ratio of silver and zinc in A = 2 : 3
Ratio of silver and zinc in B = 5 : 2
Calculation:
Silver in A = 2/5
Zinc in A = 3/5
Silver in B = 5/7
Zinc in B = 2/7
Ratio of silver and zinc in the new mixture = (2/5 + 5/7)/(3/5 + 2/7)
⇒ 39/35 : 31/35
New ratio = 39 : 31
∴ Ratio of Silver and Zinc in new alloy = 39 : 31.