In a hospital unit there are eight nurses and five physicians. Seven nurses and three physicians are females. If a person is selected at random, find the probability that the subject is a nurse or a male.
This is what I got so far, but I don't think it is right:
8/13+3/13-24/169
then get a common denominator and then solve from there??
Am I doing this right??
Thanks
2007-09-23 04:34:51 · 3 answers · asked by k_artiaco 1 in Education & Reference ➔ Homework Help
The probability is the number of favorable events over the number of possible outcomes.
There are 13 people in the unit, so 13 will always be the number of possible outcomes.
The probability of selecting a nurse is 8/13, since 8 of the 13 people are nurses.
The probability of selecting a male is 3/13 because 10 people (7 nurses and 3 physicians) are women.
If you are asking the probability of selecting either a nurse OR a male, you would add the two probabilities and subtract the chance of a male nurse, which is 1/13.
That leaves a summary probability of 10/13.
If this or another answer here proves helpful in your research, you can encourage good answers by choosing one answer as the "best answer."
Cheers,
Bruce
2007-09-30 14:04:15 · answer #1 · answered by Bruce 7 · 0⤊ 0⤋
Its 10/13:
There are 13 people altogether.
8 nurses plus 2 male physicians.
8/13 + 2/13 = 10/13
Please say if you do not understand and I will explain further!
2007-09-23 05:01:15 · answer #2 · answered by Jezzeekah! 1 · 0⤊ 0⤋
sorry, but i cant stand probability!!
ITS JUST TOO HARD!!
2007-09-23 04:42:56 · answer #3 · answered by Anonymous · 0⤊ 0⤋