In a certain match all the teams were to play with each other. If there are 10 teams, how many matches will have to be played?

a)
30
b)
45
c)
60
d)
90
e)
None of the above

• 10c2
  =45
  
  
• 9 years agoHelpfull: Yes(26) No(0)
• Option b
  9+8+7+6+5+4+3+2+1=45
• 9 years agoHelpfull: Yes(7) No(0)
• Ans=b 45
  9+8+7+6+5+4+3+2+1=45
• 9 years agoHelpfull: Yes(5) No(0)
• 10C2=45
  
  nC2
  
• 8 years agoHelpfull: Yes(3) No(0)
• 10c2=45 it is right
  
• 9 years agoHelpfull: Yes(2) No(0)
• One team play then they play 9 match
  Totally 10 teams so 10*9=90
  
• 8 years agoHelpfull: Yes(2) No(6)
• Each of the 10 teams plays 9 other teams, and 10*9 = 90. However, we are counting each pair twice (Team A, B and Team B, A should be counted as one game) so we divide by 2 to get 45. Alternatively, you can write the number of ways as 10C2
• 8 years agoHelpfull: Yes(2) No(0)
• 90 ,becoz every team has to play with remainnig 9 teams....hence 9*10=90
• 8 years agoHelpfull: Yes(1) No(17)
• total teams=10
  one team plays with 9teams
  total matches=10*9=90
• 8 years agoHelpfull: Yes(1) No(7)
• 90
  1 team wil play with all other 9 teams 1*9=9
  so in the same manner 10*9=90
• 8 years agoHelpfull: Yes(1) No(6)
• each team can play with 9 individual teams.we have total of 10 teams.Hence 9*10=90
  
• 8 years agoHelpfull: Yes(1) No(0)
• ans>
  
  10c2
• 8 years agoHelpfull: Yes(0) No(0)
• 10C2=(10*9)/(1*2)=45
  
• 8 years agoHelpfull: Yes(0) No(0)
• Ans =45. because 9+8+7+6+5+4+3+2+1=45
• 8 years agoHelpfull: Yes(0) No(0)
• 9+8+7+6+5+4+3+2+1=45
• 8 years agoHelpfull: Yes(0) No(0)
• Similar question as 7 people shake hands with each other.... how many hand shakes ? :P
  
  10C2=45
• 8 years agoHelpfull: Yes(0) No(0)
• there are 10 matches
  if they want to play with each other there are 10c2 combinations =45
• 8 years agoHelpfull: Yes(0) No(0)
• correct answer 10c2.
• 7 years agoHelpfull: Yes(0) No(0)
• b) 45
  9+8+7+6+5+4+3+2+1
• 6 years agoHelpfull: Yes(0) No(0)
• 90 each team plays 9 match with other opponent
• 6 years agoHelpfull: Yes(0) No(0)