Mixtures and Allegations Practice Test 1

If the two alloys are mixed, the mixture would contain 15 gms of each metal and it would cost Rs. (150 + 120) = Rs. 270.
Cost of (15 gms of metal A + 15 gms of metal B) = Rs. 270
Cost of (1 gm of metal A + 1 gm of metal B) = Rs.

270

15

= Rs. 18
Cost of 1 gm of metal B = Rs. (18 – 6) = Rs. 12
Average cost of original piece of alloy =

150

15

= Rs. 10 per gm.

Quantity of metal A

Quantity of metal B

=

2

4

=

1

2

Quantity of metal B =

2

1+2

×15 = 10 gms.