text: # Pre Calc
  
  The symbol nCr, rea "n choose r" or "the number of combinations of n things taken r at a time" is the number:
  
  n!
  -----
  r!(n-r)!
  
  a:find 4C1
  b:Find 5C0 and 5C5
  c: Find 7C1, 7C2, 7C3
  
  1. What is your question on this? The formula gives the algorithm.
  
  posted by bobpursley
  2. a)4!/1!(4-1)!=4 x 3 x 2/3 x 2, cancel out the 3's and 2's=4
  You do b and c. Post your answers if you'd like them checked.
  
  posted by Jen
  
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explanation: The document contains a math problem with a question and an answer. The problem is about combinations, specifically using the notation nCr, which represents the number of ways to choose r items from a set of n items without
  regard to the order. The problem provides a formula for nCr and asks the reader to find specific values for different combinations. There is also a follow-up question asking for clarification on the problem, and a response
  providing an answer for one of the parts.
distilabel_metadata.content: Evaluate the user given text extract and determine if it contains a math question and optionally and answer to this question.
  
  Output rules:
  
  1. Briefly describe the document and mention if it contains a question or a question and answer.
  2. Finalize the output with: Label: no-question,question,question-and-answer,multiple-question,multiple-question-and-answer
distilabel_metadata.role: system
distilabel_metadata.content: # Pre Calc
  
  The symbol nCr, rea "n choose r" or "the number of combinations of n things taken r at a time" is the number:
  
  n!
  -----
  r!(n-r)!
  
  a:find 4C1
  b:Find 5C0 and 5C5
  c: Find 7C1, 7C2, 7C3
  
  1. What is your question on this? The formula gives the algorithm.
  
  posted by bobpursley
  2. a)4!/1!(4-1)!=4 x 3 x 2/3 x 2, cancel out the 3's and 2's=4
  You do b and c. Post your answers if you'd like them checked.
  
  posted by Jen
  
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  1. ### math2
  
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  2. ### combinations help
  
  a menu has a list of seven appetizers. your party will choose three. which of the following represents the number of possible choices? 7/3!, 7c3,or 7!-3!. 7 appetizers, choose 3. Clearly the answer is 7 choose 3.
  3. ### Pre-Calc
  
  Hello! I'm stuck on how to do this problem and would appreciate some help! Choose a non-zero complex number c for f(z) = z2+ c. Find a complex number v that is in the escape set. Find a complex number w that is in the prisoner
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distilabel_metadata.role: user
distilabel_metadata.raw_output_q_a_detector_0: The document contains a math problem with a question and an answer. The problem is about combinations, specifically using the notation nCr, which represents the number of ways to choose r items from a set of n items without
  regard to the order. The problem provides a formula for nCr and asks the reader to find specific values for different combinations. There is also a follow-up question asking for clarification on the problem, and a response
  providing an answer for one of the parts.
  
  Label: question-and-answer