Question

The following table gives the lifetimes of 400 neon lamps

(i) Represent the given information with the help of a histogram.
(ii) How many lamps have a lifetime of more 700 h?

Answer 1

(i) Here, we will make a modified by given data:

Now, we draw the histogram for above table

(ii) 184 lamps have a lifetime of more than 700 h i.e., `74+62+48=184.`