Question 1 If nC8 = nC2, find.
Class X1 - Maths -Permutations and Combinations Page 153
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Answered by
11
nc8 =nc2: n=8+2=10 because both combination are equal
Answered by
17
here,
we have to use the result
[ if ⁿCₓ = ⁿCᵤ then, x + u = n ] this is very useful result of calculating this type of problems . I think , you should memorise this .
Here,
ⁿC₈ = ⁿC₂
so, according to results ,
n = 8 + 2 = 10
hence, n = 10
we have to use the result
[ if ⁿCₓ = ⁿCᵤ then, x + u = n ] this is very useful result of calculating this type of problems . I think , you should memorise this .
Here,
ⁿC₈ = ⁿC₂
so, according to results ,
n = 8 + 2 = 10
hence, n = 10
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