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 Feb 3, 2019

Best Answer 

 #1
avatar+17332 
+2

1/15   chance of eclair    

1/15  =   3 / (3 +  2x+6  + x)

1/15 = 3/(3x+9)     cross multiply

3x+9 = 45

x = 12

 

then the number of humbugs = 2x+6 = 2(12) + 6 = 30 humbugs

 

Prob of humbug   =   30 humbugs /(total sweets)

30 / ( 3+ 30 +12) = 30/45 = 2/3 prob of humbug

 Feb 3, 2019
 #1
avatar+17332 
+2
Best Answer

1/15   chance of eclair    

1/15  =   3 / (3 +  2x+6  + x)

1/15 = 3/(3x+9)     cross multiply

3x+9 = 45

x = 12

 

then the number of humbugs = 2x+6 = 2(12) + 6 = 30 humbugs

 

Prob of humbug   =   30 humbugs /(total sweets)

30 / ( 3+ 30 +12) = 30/45 = 2/3 prob of humbug

ElectricPavlov Feb 3, 2019

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