Every 100 mL of blood of a healthy individual has

A healthy individual has 12-16 gms of haemoglobin in every 100 ml of blood.

A healthy adult man on an average has;

5 millions to 5.5 millions of RBCs mm^–3   

6000-8000 mm^–3  leucocytes and

1,500,00-3,500,00 platelets mm^–3 of platelets.