Subject :IMO Class : Class 10
The mean height of the 10 girls of a class is 1.4 m and the mean height of the 30 boys of the class is 1.45 m. Find the approximate mean height of the 40 students of the class.
(a) 1.39 m
(b) 1.46 m
(c) 1.42 m
(d) 1.44 m
Ans 1:
Class : Class 6
Answer is (d)
absolute answer is 1.4375 m which is rounded off to 1.44 m
Ans 2:
Class : Class 10
option D