25% of the items of a data are less than 35 and 25% of the items are more than 75. Q.D. of the data is
(a) 55
(b) 20
(c) 35
(d) 75​

Q51. If 25% of the items are less than 20 and 25% are more than 40, the quartile deviation is(a) 10(b) 20(c) 30(d) none of these

A is 35% more than B, B is 25% less than C and C is 20% more than D. Which of the following is true?

A is 20% more than B, B is 10% less than C and C is 15% more than D. Which of the following is true ?

For a given data with 70 observations the less then ogive and the more than ogive intersect at (20. 5 ,35)dot The median of the data is 20 (b) 35 (c) 70 (d) 20.5

25% of a number is less than 18% of 650 by 19. The number is

25% of a number is more than 18% of 650 by 19. The number is