TCS
Company
Numerical Ability
Permutation and Combination
Pattern 10:
1. A girl has to make pizza with different toppings. There are 8 different toppings. In how many ways can she
make pizzas with 2 different toppings?
a)16 b)56 c)112 d)28
Read Solution (Total 20)
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- 8 toppings to be filled in two layers
so it is selection + arrangements
8C2=28
- 10 years agoHelpfull: Yes(31) No(5)
- i think it 56 because selection and arrangement = 8c2*2!=56
- 10 years agoHelpfull: Yes(31) No(13)
- 8c1*7c1=56
- 10 years agoHelpfull: Yes(10) No(2)
- ways to select 2 toppings from 8 are: 8C2=28
therefore ans. is 28. - 10 years agoHelpfull: Yes(6) No(4)
- 8C2= 8*7/2*1 = 28
- 10 years agoHelpfull: Yes(3) No(2)
- selection+arrangement,so it is permutation method.
8P2=8.7=56 - 10 years agoHelpfull: Yes(3) No(2)
- 56 is the ans
- 10 years agoHelpfull: Yes(3) No(1)
- total 8 topping are there
so first she can place in 8 ways
now she have left with 7 topping
total ways=8x7=56 - 10 years agoHelpfull: Yes(2) No(1)
- formula is n+r+1Cr+1
(8+2+1C2+1)= 10C3 = (10*9*8)/(1*2*3)=120 - 10 years agoHelpfull: Yes(1) No(13)
- for selecting two different topings out of 8 toppings
=8c2
=28 - 10 years agoHelpfull: Yes(1) No(1)
- 8c2=28....since there are no different ways of arranging the toppings...2 types of toppings gives the same one in 2 kinds of arrangement....and also it is not 8*7 since two must be selected at a time...
- 10 years agoHelpfull: Yes(1) No(0)
- 8 topping to be filled in two different topping
=8C2
=28 - 10 years agoHelpfull: Yes(1) No(0)
- total 8 topping are there
so first she can place in 8 ways
now she have left with 7 topping
total ways=8x7=56 - 10 years agoHelpfull: Yes(1) No(0)
- 8c2 8!/(8-2)! =56
- 10 years agoHelpfull: Yes(0) No(2)
- it should be 8C2=28
- 10 years agoHelpfull: Yes(0) No(0)
- d)28 ... as there are 8 different toppings .. she has to use .. any 2 of them .. to make the pizza ... thus .. 8c2..
- 10 years agoHelpfull: Yes(0) No(0)
- 8c2=28 ans.
- 10 years agoHelpfull: Yes(0) No(0)
- 8c2 = 28 in dis we will use the formulae directly and get the answer
- 10 years agoHelpfull: Yes(0) No(0)
8c2*2!=56 - 10 years agoHelpfull: Yes(0) No(0)
- only 8c2 = 28
- 10 years agoHelpfull: Yes(0) No(0)
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