The correct answer is: $20
Explanation:
3 pounds of hamburger is $6.
1 pound of hamburger is [tex] \frac{\textdollar 6}{3} = \textdollar 2 [/tex]
Now,
10 pounds of hamburger is [tex] \textdollar 2 * 10 = \textdollar 20 [/tex]
Hence the correct answer is $20.