A box contains 6 black and 4 white socks. A man takes out two socks. The probability that they are of the same color is:
A)5/18 B)3/5 C)4/9 D)7/15

• 4c2/10c2+(6c2/10c2)=7/15
• 4 years agoHelpfull: Yes(1) No(0)
• speed of car = x
  speed of train = 6x/5
• 4 years agoHelpfull: Yes(0) No(1)
• speed of car = x
  speed of train = 6x/5
• 4 years agoHelpfull: Yes(0) No(1)
• For Black
  1st time = 6/0
  2nd time 5/9
  
  For Black
  1st time = 6/0
  2nd time 5/9
  
  For Black
  1st time = 6/0
  2nd time 5/9
  
  For Black
  1st time = 6/0
  2nd time 5/9
  
  For Black
  1st time = 6/0
  2nd time 5/9
  
  For Black
  1st time = 6/0
  2nd time 5/9
  
  For White
  1st time = 4/10
  2nd time = 3/9
  
  6/10*5/9 + 4/10*3/9
  =7/15
• 3 years agoHelpfull: Yes(0) No(0)
• The same colour of black socks = 6c2 * 4c0 = 15
  The same colour of white socks = 6c0 * 4c2 = 6
  Total = 21
  sample space (S) = 10 (6+4)
  Probability = 21/ 10c2
  = 21 / 45
  = 7/15
• 1 year agoHelpfull: Yes(0) No(0)