Question 1184584
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You should know and understand the standard formal algebraic method for solving 2-part mixture problems, as shown by the other tutor.<br>
If a formal algebraic solution is not required, here is a simple non-algebraic way for solving 2-part mixture problems like this.  When the numbers are "nice", as they are in this problem, the answer can be obtained in a matter of seconds.<br>
(1) Observe/calculate that 14% is 4/5 of the way from 6% to 16%<br>
(2) That means 4/5 of the mixture is the higher percentage ingredient.<br>
ANSWER: 4/5 of 150kg, or 120kg, of 16% zinc; 1/5 of 150kg, or 30kg, of 6% zinc.<br>
CHECK:
.16(120)+.06(30)=19.2+1.8=21
.14(150)=21<br>