The mean heights of 3 groups of students consisting of 20, 16 and 14 students are 1.67m, 1.50m and 1.40m Respectively. What is the mean height of all the students?
A.
1.52m
B.
1.53m
C.
1.54
D.
1.55m
E.
1.56m
Correct Answer: Option C
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