Write numbers like this: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 i) As in the calendar; mark four numbers in a square and find the difference of diagonal products. Is it the same for all squares of four numbers? i) Explain why this is so, using algebra.
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Step-by-step explanation:
Class Interval
Frequency
10-20
20-30
30-40
40-50
50-60
60-70
10
12
7
7
8
3
(i) For Cumulative Frequency 30−40 frequency is 7
(ii) Size is 11
Mid point for cumulative frequency 30−40 is 35.
(iii) Range =70−10=60
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