HotPinkGirl
  • HotPinkGirl
A sandwich shop offers the toppings shown below. how many 2 topping sandwiches can you make? ham turkey lettuce tomato bacon cheese mustard A. 14 B. 21 C. 28 D. 36
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
i think there is 36
anonymous
  • anonymous
im not sure thogh tell me if im right

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More answers

campbell_st
  • campbell_st
so my question is does ham and ham count as a 2 topping sandwich
Hero
  • Hero
@smartasssskole, Change your username first.
anonymous
  • anonymous
no
anonymous
  • anonymous
it has to be like ham and letuce or cheese and bacon stuff like that
campbell_st
  • campbell_st
wow... who's question is it...?
HotPinkGirl
  • HotPinkGirl
mine
HotPinkGirl
  • HotPinkGirl
is the answer 36? @campbell_st
campbell_st
  • campbell_st
I don't think so..?
HotPinkGirl
  • HotPinkGirl
then can you help me figure out what the answer is
campbell_st
  • campbell_st
is order important.... as in which topping goes on 1st..?
HotPinkGirl
  • HotPinkGirl
i dont think so
campbell_st
  • campbell_st
so is ham and mustard the same as mustard and ham...?
HotPinkGirl
  • HotPinkGirl
i guess
campbell_st
  • campbell_st
so if order isn't important.... then you have a combination question, selecting 2 items from 7
campbell_st
  • campbell_st
do you know about combinations...?
HotPinkGirl
  • HotPinkGirl
a little bit
campbell_st
  • campbell_st
the formula is \[^nC_{r} = \frac{n!}{r!(n - r)!}\] n = the number of items you select from r = the number of items you have to select... your calculator probably has a combinations function. so you have n = 7 and r = 2 hope it helps
HotPinkGirl
  • HotPinkGirl
is it 14?
campbell_st
  • campbell_st
that seems the most obvious solution to me
campbell_st
  • campbell_st
just do the calculation....
HotPinkGirl
  • HotPinkGirl
thanks
campbell_st
  • campbell_st
oops... I ment on how to do the question... and I'd say 14 is also incorrect
HotPinkGirl
  • HotPinkGirl
oh
HotPinkGirl
  • HotPinkGirl
i still dont get it, would it be 21???@campbell_st
HotPinkGirl
  • HotPinkGirl
campbell_st
  • campbell_st
well That's my best guess at an answer
HotPinkGirl
  • HotPinkGirl
ok, thanks

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