SAT Math Practice Problems

Question:


250 grams of solution S has 60% benzene by mass and 450 grams of the solution T has 70% benzene by mass. If 90 grams of solution S is added to 90 grams of solution T, what is the percent of benzene by mass in the resulting mixture?

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-Mixed Numbers such as 2
1
2
must be entered as either a decimal, 2.5 or a fraction, 3/2.

-If a Decimal Answer does not fit in the space, it MUST be rounded AND contain 4 characters, including the decimal.
For example,
2
3
would be .667 while .666 would be incorrect and .67 would be incorrect

-Do NOT add a leading zero to a decimal, so 0.33 would be incorrect, while .33 would be correct.
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