You will need 13 vans with 3.3 rounded to 4 kids left over because 146 plus 14 equals 160 divided by 12 will get you 13.3
Answer:
9 lb 5 oz
Step-by-step explanation:
1 lb 3 oz
1lb = 16 oz
16 + 3 = 19 * 8 = 152 oz = 9 lb 5 oz
The attached diagram is a useful tool for working mixture problems. It shows the desired mix is
.. 1 kg of 30% gold
.. 3 kg of 10% gold