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7.A jar contains only red marbles and green marbles. If a marble is selected at random from the jar, the probability that a red marble will be selected is 2/3. If there are 36 green marbles in the jar, how many red marbles are there in the jar?
Answer Choices
(A) 18
(B) 24
(C) 54
(D) 72
(E) 108
Explanation
以上就是这8道SAT数学练习题的全部内容，很简单。但是大家一定要记得，不要拿这些SAT数学练习题的难度和真正的SAT数学考试的难度相比，因为SAT数学考试的难度比这个要高，大家从中需要了解的是SAT数学考试的出题方式和相关词汇。
