In a hospital unit,there are 8 nurses and 5 physicians. 7 of them are female nurses and 3 of them are male physicians. what is the the probability of selecting a staff who is Nurse or Male? plzz help


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Question Number 48553 by Cheyboy last updated on 25/Nov/18

$In a hospital unit, there are 8 nurses$ $and 5 physicians . 7 of them are$ $female nurses and 3 of them are$ $male physicians .$ $what is the the probability of$ $selecting a staff who is Nurse or$ $Male ?$ $plzz help$
Commented by mr W last updated on 26/Nov/18

$M J S s i r :$ $w h a t i f 6 o f t h e m a r e f e m a l e a n d 4$ $o f t h e m a r e m a l e p h y s i c i a n s ?$ $i s t h e p r o b a b i l i t y \frac{14}{13} > 1 ?$
Commented by MJS last updated on 26/Nov/18

$8 nurses$ $7 female \Rightarrow 1 male$ $5 physicians$ $3 male \Rightarrow 2 female$ $\Rightarrow probabikity \frac{11}{12}$ $sorry for mistake yesterday$ $8 nurses + 5 physicians$ $6 female \Rightarrow 7 male$ $5 physicians$ $4 male \Rightarrow 1 female$ $\Rightarrow 8 nurses$ $5 female \Rightarrow 3 male$ $probability in this case \frac{12}{13} because we must$ $count all nurses anyway, plus only male physicians$
	Answered by MJS last updated on 26/Nov/18

	$8 nurses out of 13 people$ $4 male out of 13 people$ $but 1 person in both sets$ $\Rightarrow 11 persons are ‘ ‘ nurse o r {male}^{″}$ $\Rightarrow p = \frac{11}{13}$
	Commented by Cheyboy last updated on 25/Nov/18

	$Thank you sir$
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