网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
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?
A
98
B
99
C
100
D
101
E
102
参考答案
参考解析
解析：
If the average (arithmetic mean) of a set of seven numbers is 81, then the sum of these seven numbers is 7 x 81 or 567. Since, if one of the numbers is discarded, the average of the six remaining numbers is 78, the sum of these six numbers is 6×78 or 468. Since 567 - 468 = 99, the value of the number that was discarded is 99.
If the average (arithmetic mean) of a set of seven numbers is 81, then the sum of these seven numbers is 7 x 81 or 567. Since, if one of the numbers is discarded, the average of the six remaining numbers is 78, the sum of these six numbers is 6×78 or 468. Since 567 - 468 = 99, the value of the number that was discarded is 99.
更多 “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?A 98B 99C 100D 101E 102” 相关考题
考题
When a BGP router is not capable of understanding 4-byte AS numbers， it will see 4-byte AS numbers as aspecial， reserved， 2-byte AS number in the AS path. Which 2-byte AS number is this reserved one？（）A、00000B、12345C、23456D、65000E、99999
考题
tommy has created a sales view in his sales.nsf database. Tommy wants negative numbers in the sales number column in the view parenthesis. which one of the following should tommy do?（）A、select the parenthesis when negative value in the view properties box B、select the parenthesis when negative value in the column properties box C、use the @function @negative to set this in the column formula in the view D、use a formula to format the value in the field on the form that will be displaying in the view
考题
What do the entries in the /proc directory represent？（）A、They are the decimal numbers corresponding to the active process IDs.B、They are the decimal numbers corresponding to the gid of the system group.C、They are the decimal numbers corresponding to the block IDs of the boot sector.D、They are the decimal numbers corresponding to the inodes of the system directories.
考题
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?A
6B
10C
12D
18E
20
考题
单选题What is the average (arithmetic mean) of 8 consecutive odd integers if the smallest of those integers is n?A
n+5B
n+6C
n+7D
n+8E
n+9
考题
多选题If 4 more than twice n is a negative number and 6 more than n is a positive number, which of the following numbers could be the value of n? (Select all such numbers.)A-5B4C-3
考题
单选题If the average of the two-digit numbers 1N, N7, and NN is 35, then N= ______.A
2B
3C
4D
5E
6
考题
单选题tommy has created a sales view in his sales.nsf database. Tommy wants negative numbers in the sales number column in the view parenthesis. which one of the following should tommy do?（）A
select the parenthesis when negative value in the view properties box B
select the parenthesis when negative value in the column properties box C
use the @function @negative to set this in the column formula in the view D
use a formula to format the value in the field on the form that will be displaying in the view
考题
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?A
6.0B
6.2C
6.4D
6.6E
6.8
考题
单选题Let @ represent one of the four basic arithmetic operations such that, for any nonzero real numbers P and Q, P @ 0=P and P @ Q=Q @ P. Which arithmetic operation(S) does the symbol @ represent?A
×onlyB
+onlyC
-onlyD
-and×E
+and÷
考题
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?A
The average (arithmetic mean) of set SB
The median of set SC
The mode of set SD
The range of set SE
The standard deviation of set S
考题
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.
考题
问答题What is the value of the greater of two numbers if one of the numbers is three times the smaller number? (1) one of the numbers is 12. (2) The sum of the two numbers is 16.
考题
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.
考题
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?A
5B
10C
20D
30E
40
考题
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?A
98B
99C
100D
101E
102
考题
问答题A set dominoes(多米诺) consists of rectangular (矩形的) tiles each carrying two numbers from 0 to 6 which represented by patterns of spots. Every possible pairing of numbers occurs just once including each number with itself. How many dominoes are there in a set?
考题
单选题What do the entries in the /proc directory represent？（）A
They are the decimal numbers corresponding to the active process IDs.B
They are the decimal numbers corresponding to the gid of the system group.C
They are the decimal numbers corresponding to the block IDs of the boot sector.D
They are the decimal numbers corresponding to the inodes of the system directories.
考题
单选题For which set of numbers do the average, median, and mode all have the same value?A
2, 2, 2, 2, 4B
1, 3, 3, 3, 5C
1, 1, 2, 5, 6D
1, 1, 1, 2, 5E
1, 1, 3, 5, 10
考题
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
5.5B
6C
6.5D
7E
7.5
考题
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?A
mB
4/3mC
3/2mD
5/3mE
2m
考题
单选题x, y, and z are positive integers. Which of the following lists all the possible ways for x + y + z to be an odd number?I. One of the numbers is odd.II. Two of the numbers are odd.III. Three of the numbers are odd.A
IB
I and IIC
I and IIID
II and III
考题
单选题If the average (arithmetic mean) of a, b, 4, and 10 is 8, what is the value of a + b?A
4B
6C
9D
15E
18
考题
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.
考题
单选题When a BGP router is not capable of understanding 4-byte AS numbers， it will see 4-byte AS numbers as aspecial， reserved， 2-byte AS number in the AS path. Which 2-byte AS number is this reserved one？（）A
00000B
12345C
23456D
65000E
99999
考题
问答题Can you find the missing value on the roof of the following house? Each of the numbers on the windows and door must be used only once and no number can be reversed.
热门标签
最新试卷
