In a certain examination, 50% students passed in Account, 30% students passed in English, 30% failed in both and 50 students passed in both subjeots. By drawing Venn diagram, find the number of students who passed in Account only.​

Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?