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Would anyone check my solutions to a few probability questions (1 Viewer)

HeroWise

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Working out for 17 a , in the HSC requires this step

the ensures you get any card and the is any other specific card

17 b is



Uses binomials
 
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HeroWise

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For 18

Count all the yellows and the blue only once you should get 11 total outcomes. I understand in you thinking its from the total set but if u think about it the question is talking about "atleast 3" only.
 

kpad5991

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For 18

Count all the yellows and the blue only once you should get 11 total outcomes. I understand in you thinking its from the total set but if u think about it the question is talking about "atleast 3" only.
Are the others correct?
 

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