5
4
3.9
3.4
3.0
Correct answer is B
x = 5, \(\frac{\sum {fx}}{\sum {f}}\) =
5= \(\frac{\sum {fx}}{30}\)
\(\sum {fx}\) = 5 x 30 = 150; 150 - 34 = 116
\(\sum {f}\) = 29
\(\sum {fx}\) = 116
= \(\frac{116}{29}\) = 4
Which of the following is not a measure of dispersion?
Mode
Mean deviation
Range
interquartile range
Standard deviation
Correct answer is A
No explanation has been provided for this answer.
15
30
35
45
50
Correct answer is C
No explanation has been provided for this answer.
P = {2, 1,3, 9, 1/2}; Q = {1,21/2,3, 7} and R = {5, 4, 21/2}. Find P∩Q∩R
(21/2)
∅
(1, 3, 7)
(4)
(5,7,9)
Correct answer is B
No explanation has been provided for this answer.
P={2, 1,3, 9, 1/2}; Q = {1,21/2,3, 7} and R = {5, 4, 21/2}. Find P∪Q∪R
(21/2)
(1, 9)
(1, 2, 3, 4, 5, 6, 7)
(5, 4, 21/2)
(1/2, 1, 2, 21/2, 3, 4, 5, 7, 9)
Correct answer is E
P = {2,1,3,9,1/2}; Q = {1,21/2,3,7}
R = {5,4,212}
P∪Q∪R = {1/2,1,2,21/2,3,4,5,7,9}
= {1/2,1,2,21/2,3,4,5,7,9}