The Venn-diagram below shows the result of a survey conducted at a City Hospital Kathmandu who were attended on a particular day. Set W represents those who complained of body weakness, set H those who complained for headache and set F those who complained of fever. a

- Use the information in the Venn-diagram to find the number of people who complained
- body weakness only
- body weakness and fever only
- headache

- Calculate the percentage of those who complained of all the ailments.