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Help 4,5

 Apr 26, 2018
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4. Experimental probability is just based on the results obtained...so...

 

P(Heads)  =  44 heads in  70 tosses  =  44/70  = 22/35

 

 

5.   Note...that if Teesha  is not considered for selection...the probability of selecting any other person first  is  38/39  and the probability of selecting a second person ( but not Teesha)  is   37/38

 

So....the total probability  is      38/39 * 37/38   =   (38/38) * (37/39)  =  1 * 37/39  = 37/39

 

cool cool cool

 Apr 26, 2018

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