单选题If the average (arithmetic mean) of 3, 7, 10, and x is 7, then what is the median of 3,7,10, and x?A5.5B6C6.5D7E7.5
单选题
If the average (arithmetic mean) of 3, 7, 10, and x is 7, then what is the median of 3,7,10, and x?
A
5.5
B
6
C
6.5
D
7
E
7.5
参考解析
解析：
因为3,7,10,和x 的平均数是7，可得出等式(3+7+10+x)/4=7，(20 + x)/4= 7，20+ x = 28，x = 8。所以3,7,10,和x四个数排序为3,7,8,10，它们的中位数为(7+8)/2=7.5。
因为3,7,10,和x 的平均数是7，可得出等式(3+7+10+x)/4=7，(20 + x)/4= 7，20+ x = 28，x = 8。所以3,7,10,和x四个数排序为3,7,8,10，它们的中位数为(7+8)/2=7.5。
相关考题：
在Excel2003中,C7单元格中有函数=AVERAGE($C$3:$C$6),把它复制到C8单元格后,再双击C8,则该单元格中显示()。 A.=AVERAGE(C3:C6)B.=AVERAGE(C4:C7)C.=AVERAGE($C$3:$C$6)D.=AVERAGE($C$4:$C$7)
求A1至A7 7个单元格的平均值,应用公式() A、AVERAGE(A1：A7，7)B、AVERAGE(A1：A7)C、SUM(A1：A7)/7D、SUM(A1：A7)/COUNT(A1:A7)
In a weather report GMT stands for ________ ．A.Greenwich Mean TimeB.Local Mean TimeC.General CargoD.General Average
在Excel中，C7单元格中有绝对引用=AVERAGE($C$3：$C$6)，把它复制到C8单元格后，双击它单元格中显示()。A、=AVERAGE(C3、C6)B、=AVERAGE($C$3、$C$6)C、=AVERAGE($C$4、$C$7)D、=AVERAGE(C4、C7)
在Excel2003中，C7单元格中有函数=AVERAGE（$C$3：$C$6），把它复制到C8单元格后，再双击C8，则该单元格中显示（）。A、=AVERAGE（C3：C6）B、=AVERAGE（$C$3：$C$6）C、=AVERAGE（$C$4：$C$7）D、=AVERAGE（C4：C7）
问答题Kara attends a university where students study for an average (arithmetic mean) of 13.4 hours per week. How many hours per week does Kara study? (1) The standard deviation of study time at Kara’s school is 2.8. (2) Kara’s study time is one standard deviation away from the mean.
单选题What is the average (arithmetic mean) of 8 consecutive odd integers if the smallest of those integers is n?An+5Bn+6Cn+7Dn+8En+9
单选题If the average of 8 and x is 10 and the average of 7 and y is 11, what is the average of x and y?A9.0B10.5C12.0D13.5E15.00
单选题The average (arithmetic mean) of c and d is 12, and the average of c, d, and e is 10. What is the value of e?A6B10C12D18E20
单选题ou can visit Galloway Wildlife Conservation Park ______Aat 9:00 a. m. on 7th DecemberBat 11:00 a.m. on 7th DecemberCat 9:00 a.m. on 7th SeptemberDat 11:00 a. m. on 7th September
单选题If the set S is composed of the following numbers {99, 100, 100, 105, 106, 116, 123}, which of the following is largest?AThe average (arithmetic mean) of set SBThe median of set SCThe mode of set SDThe range of set SEThe standard deviation of set S
单选题If the average (arithmetic mean) of 3, 7, 10, and x is 7, then what is the median of 3,7,10, and x?A5.5B6C6.5D7E7.5
单选题The average (arithmetic mean) of x and y is m, where m ≠ 0. What is the average (arithmetic mean) of x, y, and 2m?AmB4/3mC3/2mD5/3mE2m
问答题What is the average (arithmetic mean) of x and y? (1) The average of x+3 and y+5 is 14. (2) The average of x,y and 16 is 12.
问答题If a is an integer, is b an integer? (1) The average (arithmetic mean) of a and b is an integer. (2) The average (arithmetic mean) of a, b, and b+4 is a.
单选题The average (arithmetic mean) of a set of seven numbers is 81. If one of the numbers is discarded, the average of the remaining numbers is 78. What is the value of the number that was discarded?A98B99C100D101E102
单选题If the average (arithmetic mean) of a, b, 4, and 10 is 8, what is the value of a + b?A4B6C9D15E18
单选题If 70% of the bananas in a particular harvest had an average (arithmetic mean) length of 7 inches and 30% of the bananas in that harvest had an average (arithmetic mean) length of 5 inches, what was the average (arithmetic mean) length, in inches, of all of the bananas in the harvest?A6.0B6.2C6.4D6.6E6.8
问答题If M is a set of five numbers p, q, r, s and t, is the range of numbers in M greater than 5? (1) The average (arithmetic mean) of p, q, r, S, and t is 5. (2) p-r5.
单选题For integer values of the age from 10 months to 14 months, the average (arithmetic mean) weight falls approximately between ______ pounds.A750 and 850B850 and 950C950 and 1050
单选题The average (arithmetic mean) of five numbers is 10. The sum of three of the numbers is 30. What is the sum of the other two numbers?A5B10C20D30E40
问答题MegaTech and UltraCorp are considering a merger to form the MegaUltraTech Corporation. Does MegaTech have more employees than UltraCorp? (1) The average (arithmetic mean) age of UltraCorp employees is 32.8, while the average age of MegaTech employees is 27.2. (2) If the merger goes through and all employees from both companies remain employed, the average (arithmetic mean) age of the MegaUltraTech employees will be 31.4.