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Maths Puzzle
Numerical Ability
What is Σ ( 3K) where is the number of ways of choosing k items from 28 items?
Read Solution (Total 2)
-
Σ (3K) = 3* Σ (28ck) [where k= 0 to 28]
= 3 * Σ(28c0+28c1+28c3+...+28c28)
= 3 * 2^28
- 10 years agoHelpfull: Yes(4) No(0)
- 3k1+3k2+3k3......3kN=28Ck1+28Ck2+28Ck3....+28CkN.
Where,
3kn=28Ckn,where n=1,2,3,...
- 10 years agoHelpfull: Yes(0) No(0)
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