In a hospital ward, there are fifteen nurses and three doctors.....

Question

anonymous · Answer

In a hospital ward, there are fifteen nurses and three doctors. Nine of the nurses and one of the doctors are female. If a person is randomly selected from this group, what is the probability that the person is male or a doctor? 

 nine over eighteen 

 two over fifteen 

 eight over fifteen 

 eight over eighteen

anonymous · Answer

First write down what you know

anonymous · Answer

You have 
males - 15 nurses -9 nurses = 6 males
males- 3 doctors - 1 doctor = 2 males

Assuming there are no transgenders lol

ganeshie8 · Answer

lol

anonymous · Answer

That would make it 8/18 probability?
No, I don't know the 'rule'..

anonymous · Answer

Total number of people are 15 +3 =18

ganeshie8 · Answer

and count how many either "male" or "doctor"

anonymous · Answer

@ganeshie8  can u continue my internet is down

anonymous · Answer

and OS is lagging

anonymous · Answer

Does it have to be a male doctor or any in general?
If any, then 9/18...?

ganeshie8 · Answer

Yep !

ganeshie8 · Answer

3 doctors  +  6 male nurses

makes it 9 favorables

ganeshie8 · Answer

divide it by the total ppl to get the desired probability