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Math paper4 Jun. 2009 help

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cooldude:

--- Quote from: moon on November 02, 2009, 04:57:29 pm ---Please I need help in JUNE 2009 Q2(d)

--- End quote ---

im gonna use | for the summation (sigma) symbol
we knw that Mean=|fx/|f

therefore the sum of the 60 dice rolls is=Mean*|f
=> 2.95*60=177
the sum of the 50 dice rolls-Mean*|f
=> 2.96 (found in part c)*50=148
therefore the sum of the last 10 rolls=177-148=29
therefore the mean of the 10 rolls=|fx/|f
=>29/10=2.90
okay temme if u dnt get nething?

          

SGVaibhav:
why does it have to be june 2009?

wassup:

--- Quote from: moon on November 02, 2009, 04:57:29 pm ---Please I need help in JUNE 2009 Q2(d)

--- End quote ---

c) Mean score for 50 rolls = ((15*1)+(10*2)+(7*3)+(5*4)+(6*5)+(7*6))/50
                                   = 2.96

d) Mean score for 60 rolls = 2.95

60*2.95 = 177
50*2.96 = 148

So, 177-148 = 29

Mean of 10 rolls = 29/10
                      = 2.9


  

nid404:
lol 5 answers to that question........haha

@d!_†oX!©:
man!!!!!
after so many explanations anyone can understand it!!!
this shows how eager ppl at sf are to help others!!!
Thanks alot cooldude, nid, manbir, wassup and me too!!!

By the way moon....tll us if u didn't understand anything!!u'll have another 10 ppl tryina explain it to u!!

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