GRE(QUANTITATIVE)练习试卷13(题后含答案及解析).pdfVIP

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GRE(QUANTITATIVE)练习试卷13(题后含答案及解析).pdf

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GRE （QUANTITATIVE ）练习试卷13 (题后含答案及解析) 题型有： 2. 1． Ann scored 88, 93, 84, and 99 on 4 tests. What is her mean test score? 正确答案：The mean is the average, so simply add the test scores and divide by 4 (the total number of tests): 88+93+84+99=364 364 ÷4=91 2 ． What is the mode of the data given below? 7,3,6,7,5,8,9,7 正确答案： The mode is the number that appears most frequently in a series of numbers. In this case, the mode is 7. 3 ． What is the median of the data given below? 8, 13, 9, 8, 15, 14, 10 正确答案： The median is the middle value in an ordered set of values. Therefore, the first step is to put the numbers in order, as follows: 8, 8, 9, 10, 13, 14, 15 As you can see, 10 is the middle value. 4 ． Jordan had 3 hits in his first 4 baseball games and 4 hits in his next 4 games. What is the average number of hits Jordan had in all of his games? 正确答案： To calculate Jordan ’s average number of hits, first find his total number of hits: 3 ×4=12 and4 ×4=16 12+16=28 Next, find the average: 28 ÷8=3.5 5 ． What is the median of the data given below? 80, 19, 82, 15, 72, 3 正确答案： The median is the middle value in an ordered set of values. Therefore, the first step is to put the numbers in order, as follows: 3, 15, 19, 72, 80, 82 Because the set includes an even number of values, take the average of the middle values: 19+72=91 91-2=45.5