Permuatation and Combination
pls solve krke explain krdo ye question
grouping and divison wala concept lagega
9 Replies
@Apu
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90 hai ans
.
give each of them heights 1-6 (6 being tallest)
now make 3 pairs of 2 people
and seat them in 2 columns
like (6,5) (4,3) (2,1)
first wale back seat, 2nd wale samne ke seat mein
so first pair can be chosen in 6c2 = 15 ways
and 2nd one in 4c2=6 ways
last one 2c2 =1 way
ans = 15x6x1 = 90
thanks bhai
aagaya samajh
nice! Can you please close the thread out?
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