nurakib wrote:
sukrut96 wrote:
Thus, the range is from 1,600 (least amount of people who could've suffered from condition A and B) to 2,600 (maximum amount of people).
How do you calculate the least value, why can't I say least value is 1000?
Because you already have a higher value than 1000. 1600 people with Condition B have been prescribed drug X.
so, it has to be between 1600 and 2600
Think it this way;
People with Condition A = 1000
People with Condition B = 1600
People with Both the Conditions A and B = 1000 (Max. Intersection) and only Condition B = 600
Total people with prescription = 1600
i.e. (1000) + 600
Maximum = Condition A and Condition B separately = 1000 + 1600 = 2600 ......... (Only Union, no Intersection)