18. The class mark of the modal class of the data is..
Class interval. frequen
0 - 10. 2
10-20. 5
20 - 30 4
30 - 40. 8
40 - 50. 9
50 - 60. 7
(A) 25
(B) 35
(C) 45
d) 55
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Answer:
(B)35 ...........................
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