During the medical check-up of 35 students of a class their weights were recorded as follows

Draw a less than type and a more than type ogive from the given data. Hence, obtain the median weight from. the graph

Explanation

Less Than Series:
We may prepare the less than series as under.

Scale: `{("Along the x-axis, 5 small div,=1 kg"),("Along the y-axis , 10 small div,=5 student"):}`
Now, plot the points A(40, 3), B(42, 5), C(44, 9), D(46, 14), E(48, 28), F(SO, 32) and G(52, 35) on a graph paper.
Join AB, BC, CD, DE, EF and FG freehand to get the curve representing 'Less Than Series'.
(ii) More Than Series:
We may prepare the more than series as under.

On the same graph paper as above, we plot the points P(38, 35), Q(40, 32), R(42, 30), 5(44, 26), T(46, 21), U(48, 7) and V(50, 3).
Join PQ, QR, RS, ST, TU and UV freehand to get the curve representing 'More Than Series'.


The two curves intersect at the point L. Draw LM `bot` OX.
`therefore` median weight = OM = 46.5 kg.