Alloy A contains metals x and y only in the ratio 3 : 4 and alloy B contains these metals in the ratio 5 : 1. Alloy C is prepared by mixing A and B in the ratio 3 : 2. The percentage of y (approx) in alloy C is:

41

          x      :       y

A-       3      :      4    = 7     ) × 6 ×3

B-       5      :      1    = 6     ) × 7 ×2

          x      :       y

A-      54     :      72     

B-      70     :      14       

C -    124    :      86

          62    :      43     =    105

percentage of y in C = \(\frac{43}{105}\) × 100 = 41 (approx)