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Can you please help me with this question

 Apr 26, 2018
 #1
avatar+101416 
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a)

       2   4   6    8

 

1     3   5   7   9   

3     5   7   9  11

5     7   9   11 13

 

b)  The probability of a "7" is   3/12  = 1/4

 

This means that if 120 play the game, the school will collect   120 * 20p  = 2400p

But...1/4 of the people will win  =  30 people...and the school will have to spend 30 * 30p =

900p  for lollipops

 

So...the school will collect   2400 - 900  =   1500p

 

cool cool cool

 Apr 26, 2018
edited by CPhill  Apr 26, 2018

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