In 1 – 10, 11 – 20, 21 – 30 ………… Upper Boundary of class 11-20 is …………..
In 1 – 10, 11 – 20, 21 – 30 ………… Upper Boundary of class 11-20 is …………..
A) 20.5
B) 19.5
C) 29
D) 30
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