If the number is less than half of 100, then it means that the number is less than 50.
The following table gives the life-time (in days) of 100 electric bulbs of a certain brand.
Life−time(in days)Less than 50Less than 100Less than 150Less than 200Less than 250Less than 300Number of bulbs721527991100
From this table,construct the frequency distribution table.