For (B), I am getting 2/6... how did textbook come up with 4/7?

math951 Jul 2015 694 24 United States Oct 28, 2019 #1 For (B), I am getting 2/6... how did textbook come up with 4/7?

P Plato MHF Helper Aug 2006 22,506 8,663 Oct 28, 2019 #2 math951 said: View attachment 39539 For (B), I am getting 2/6... how did textbook come up with 4/7? Click to expand... How many friends does she have totally? Of those, how many are at a restaurant with another of her friends?

math951 said: View attachment 39539 For (B), I am getting 2/6... how did textbook come up with 4/7? Click to expand... How many friends does she have totally? Of those, how many are at a restaurant with another of her friends?

math951 Jul 2015 694 24 United States Oct 28, 2019 #3 She has 6 friends in total. Those at a restaurant with another of her friends are 2.

math951 Jul 2015 694 24 United States Oct 28, 2019 #4 So the denominator just includes her at the restaurant now, okay. I see

P Plato MHF Helper Aug 2006 22,506 8,663 Oct 28, 2019 #5 math951 said: She has 6 friends in total. Those at a restaurant with another of her friends are 2. Click to expand... NO! She has seven friends: $1+1+1+2+2=7$

math951 said: She has 6 friends in total. Those at a restaurant with another of her friends are 2. Click to expand... NO! She has seven friends: $1+1+1+2+2=7$