Qualification > Math
Additional Math Help HERE ONLY...!
astarmathsandphysics:
letter M is selcted so in fact you are only choosing 3 from 6C3
astarmathsandphysics:
Since she must select her favourite beatles cd she is only choosing 3 from 8 so 8C3
BlackBunny103:
--- Quote from: astarmathsandphysics on June 07, 2010, 11:45:22 pm ---letter M is selcted so in fact you are only choosing 3 from 6C3
--- End quote ---
Oh right, this makes sense. Thanxx :D
--- Quote from: astarmathsandphysics on June 07, 2010, 11:47:34 pm ---Since she must select her favourite beatles cd she is only choosing 3 from 8 so 8C3
--- End quote ---
I understand the concept, but I'm thinking since she's selecting 4 from 9 and there are 4 beatles cs in total, so what if all of her selections contain 4 Beatles CD? What I did was 9C4.
astarmathsandphysics:
her FAVOURITE beatles cd so remove one from the selection sincve this is taken
BlackBunny103:
I need help with this question, how can you find a?
Thanxx :D
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