A data has 25 observations (arranged in descending order).Which observation represents the median?
12th
13th
14th
15th
Which of the following is true?
Mode = 3 median + 2 mean
Mode = 3 median - 2 mean
Mode = 2 median + 3 mode
Mode = 2 median - 3 mean
The arithmetic mean of first n natural number
n/2
n/2 + 1
If the arithmetic mean of 6 , 8 , 5 , 7 , x and 4 is 7 , then x is
12
6
8
4
What are the average marks obtained by the students?
57
63
80
48
The mode of a set of observations is the value which
occurs most frequently
is central
is between maximum and minimum
none of these
Mean =
Sum of observations × Number of observations
Sum of observations + Number of observations
Sum of observations - Number of observations
The mean and median of a data are 14 and 15 respectively. The value of mode is
16
17
13
18
In which subject is the student poor?
English
Mathematics
Science
History
The arithmetic mean of first ten natural numbers is
5.5
7.5
10
