a
9
b
15
c
18
d
21
e
25
Explanation
Correct Option
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Discussions (1)

emekax ndukwe
12 years ago
Less than 7 in the above graph is 6=6(s),5=3(s),4=4(s),3=2(s)......
Add all the number of student 6+3+4+2=15ANS


