Height 
Boys (f) 
c.f 
Girls (f) 
c.f. 
135 
2 
2 
1 
1 
140 
5 
7 
2 
3 
147 
12 
19\(\leftarrow\) 
10 
13 
152 
10 
29 
5 
18\(\leftarrow\) 
155 
7 
36 
6 
24 
160 
1 
37 
5 
29 


N = 37 
N = 29 

Boys median class = \(\frac {37+1}{2} = \frac {38}{2}\) = 19th
observation
∴ Median height of boys = 147 cm
Girls median class = \(\frac {29+1}{2} = \frac {30}{2}\) = 15th
observation
∴ Median height of girls = 152 cm