A girl has to make pizza with different toppings. There are 8 different toppings. In how many way can she make pizzas with 2 different toppings?
a)16 b)56 c)112 d)28

• it can be done in 8c2 ways=28
  ans:28
• 12 years agoHelpfull: Yes(71) No(20)
• Considering First Toplling...Possible Pairs Are (1,2)(1,3)....(1,8) Total 7...Consider 2nd Toppling (2,1)(2,3)...(2,8) Like These All Comes To 7*8=56
• 12 years agoHelpfull: Yes(24) No(57)
• 8c2 = 8*7/2 = 28
• 12 years agoHelpfull: Yes(22) No(6)
• ofcourse 8c2 i.e. 28 ways...
  
  many people saying 56 by defining combination like
  (1,2)(1,3)....(1,8) Total 7...Consider 2nd Toppling (2,1)(2,3)...(2,8) Like These All Comes To 7*8=56 but,
  (1,2) and (2,1) is same combination guys so its wrong...
• 10 years agoHelpfull: Yes(18) No(0)
• 8C2, use combination
• 12 years agoHelpfull: Yes(14) No(5)
• 8c2=8*7*6!/2!*6!=28
• 12 years agoHelpfull: Yes(13) No(3)
• 8c2=8*7/2=28
• 12 years agoHelpfull: Yes(11) No(3)
• 8c2=56 is the answer
  
• 12 years agoHelpfull: Yes(10) No(81)
• total 8 different toppings are there,she makes 2 different toppings
  8c2=28
• 12 years agoHelpfull: Yes(9) No(3)
• 8c2 ways nothing but 8*7/2*1=28 ways
• 12 years agoHelpfull: Yes(7) No(4)
• 8p2=28...tats right answer...
  
  
• 11 years agoHelpfull: Yes(4) No(9)
• its is about arranging 2 different toppings .. and so it shuld be 8P2. which is equal to 57 arrangements can be done.... use permutation....
• 11 years agoHelpfull: Yes(3) No(3)
• (1,2)(1,3)(1,4)(1,5)(1,6)(1,7)(1,8)--taking with 1 and repeating with others
  (2,3)(2,4)(2,5)(2,6)(2,7)(2,8)
  (3,4)(3,5)(3,6)(3,7)(3,8)
  (4,5)(4,6)(4,7)(4,8)
  (5,6)(5,7)(5,8)
  (6,7)(6,8)
  (7,8)--ans 28
• 7 years agoHelpfull: Yes(2) No(0)
• 8 fro 2 choice 8c2 =28
• 8 years agoHelpfull: Yes(1) No(0)
• it would be 8^2-8=56
• 8 years agoHelpfull: Yes(1) No(1)
• 56
  coz 7* 8=56
• 8 years agoHelpfull: Yes(1) No(1)
• yeah,28 ways,by using combination 8c2=8!/2!*6!
• 7 years agoHelpfull: Yes(1) No(0)
• ofcourse 8c2 i.e. 28 ways...
• 9 years agoHelpfull: Yes(0) No(0)
• it can be done in 8c2 ways and answer is 28
• 7 years agoHelpfull: Yes(0) No(1)
• We need to select two topping from 8 toppings.So this problem is upon combination.
  This can be done in 8c2 ways.
  (8*7)/2=28
• 5 years agoHelpfull: Yes(0) No(0)
• Formula nCr= nC n-r
  8C2=8C(8-2)
  8C6=8*7*6/6 = 56
• 5 years agoHelpfull: Yes(0) No(1)
• The answer is 8C2=28
• 3 years agoHelpfull: Yes(0) No(0)