Elitmus
Exam
Numerical Ability
Data Interpretation
In how many ways you can form a sandwich from yellow,blue,white,red color such that no two adjacent color are same.
Read Solution (Total 13)
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- since no two adjacent should be same.
so for 1st position 4 choices
for 2nd it is 3
for 3rd since it will not repeat color of 2nd but can repeat the 1st so 3.
same as for 4th it will be 3
thus answer is 4*3*3*3=108.ans - 10 years agoHelpfull: Yes(56) No(0)
- i m sorry i did calculation mistake its 108 ways ,...4*3*3*3
- 10 years agoHelpfull: Yes(4) No(0)
- total is 4 colours
there fore in 4 * 3* 2= 24 ways
- 10 years agoHelpfull: Yes(3) No(12)
- we have four position and arranging four color
1st position 4 color place
2nd position 3 color place
3 rd position 3 color place
4th position 3 color place
so no of ways =4*3*3*3 =108 ways - 9 years agoHelpfull: Yes(2) No(0)
- the previous ans has not been posted properly
24 ways
Y B W | B Y R | R B W | W R Y
Y B R | B Y W | R B Y | W R B
Y W B | B R Y | R Y B | W Y B
Y W R | B R W | R Y W | W Y R
Y R B | B W R | R W Y | W B Y
Y R W | B W Y | R W B | W B R
Y- yellow, R -red, W- white, B- blue - 10 years agoHelpfull: Yes(1) No(5)
- No of ways = 4!= 24
because we have to arrange 4 different things. so it will be 4P4 = 4!=24 - 10 years agoHelpfull: Yes(1) No(4)
- Answer is 36
I II III 3 layers of sandwich
first place can be any of the 4 colors, so I
second place can be any color EXCEPT the first i.e I ....... so (4-1) = 3
third place can be any color EXCEPT the second one........ so (4-1) = 3
Kindly note : condition is ADJACENT SHOULD NOT BE SAME i.e. I and III layer can be same
Therefore 4*3*3 = 36 Ans - 9 years agoHelpfull: Yes(1) No(2)
- 4+3+2+1=10 ways
- 10 years agoHelpfull: Yes(0) No(5)
- 24 ways
Y B W B Y R R B W W R Y
Y B R B Y W R B Y W R B
Y W B B R Y R Y B W Y B
Y W R B R W R Y W W Y R
Y R B B W R R W Y W B Y
Y R W B W Y R W B W B R
Y- yellow, R -red, W- white, B- blue - 10 years agoHelpfull: Yes(0) No(2)
- in this case we directly take 4! ie 24
so 24 ways is the ans - 10 years agoHelpfull: Yes(0) No(8)
- Ans will be 18 ways
- 10 years agoHelpfull: Yes(0) No(3)
- 144
we can write like this
if we take firstly yellow colour
Y_Y_
yellow we can take in 4 ways but next colour should be taken in three ways becz we can't take yellow
4*3*4*3=144 - 7 years agoHelpfull: Yes(0) No(0)
- 108
4*3*3*3=108 - 7 years agoHelpfull: Yes(0) No(0)
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