Numbers 5, 15, 20, x, 28, 30, 35 are in ascending order and have median = 23; then the value of x is :
24
29
17.5
23
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The median of 18, 29, 15, 14 and 21 is :
15
18
21
The median of 3, 8, 11, 2, 16, 4, 0 and 6 is :
6
9
5
8
For numbers 10, 20, 30, 40, 50, 60, 70 and 80; the inter-quartile range is :
20 + 60
60 - 30
60 - 20
50 - 10
From the given diagram, the modal class is :
30 - 40
40 - 50
50 - 60
60 - 70
