Answer:
The amount of silver used in 2100 ounce mixture is 972.44 ounce.
Explanation:
The amount of silver used in 907 ounce mixture = 420 ounce
⇒ The ratio of Silver Used : Total Mixture = 420 : 907 .. (1)
Let us assume the amount of silver used in 2100 ounce mixture = m
⇒ The ratio of Silver Used : Total Mixture = m : 2100 .... (2)
Now, by the RATIO OF PROPORTIONALITY:
As, both equation (1) and (2) represent the same ratio, so they should be equivalent.
⇒ 420 : 907 = m : 2100
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or, m = 972.44 ounces
Hence, the amount of silver used in 2100 ounce mixture is 972.44 ounce.