Answer:
6.5 ounces
Step-by-step explanation:
To find out how many ounces of pure gold Class 7B collected, we need to calculate the amount of pure gold in their collected sand.
Class 7B collected 55 oz of gold sand that contains 11% gold.
The amount of pure gold ([tex]G_{7B}[/tex]) can be calculated as follows:
[tex] G_{7B} = 11\% \textsf{ of gold sand } [/tex]
[tex] G_{7B} = \dfrac{11}{100} \times 55 [/tex]
Now, calculate the value:
[tex] G_{7B} = 0.11 \times 55 [/tex]
[tex] G_{7B} = 6.5 [/tex]
So, Class 7B collected 6.5 ounces of pure gold.
