permutations and combinations

BITSAT 2015 Questions › Algebra questions › permutations and combinations

THERE ARE 10 INTERMEDIARY STATIONS BETWEEN TWO JUNCTIONS WHERE AN EXPRESS TRAIN STOPS.IF 6 PERSONS BOARD THE TRAIN AT SOME INTERMEDIARY STATION OR OTHER DURING THE JOURNEY AND EACH OF THE 6 PASSENGERS HOLD A DIFFERENT VARIETY OF TICKET OF THE SAME CLASS THEN FIND THE NUMBER OF WAYS IN WHICH THEY CAN HOLD THEIR TICKETS?

#Mathematics #Algebra

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3 Answers

13

Ð”Ð²Ò¥Ñ—ÑuÏ now in medical c ·2009-03-17 00:34:17

⁴⁵P₆

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Surbhi Shah ·2009-03-17 00:45:14

how did you do it ? can you please explain?

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Ð”Ð²Ò¥Ñ—ÑuÏ now in medical c ·2009-03-17 00:48:15

6 PERSONS BOARD THE TRAIN AT SOME INTERMEDIARY STATION.....

so. no. of possible tickets ¹⁰C₂=45

6 persons can hold tickets in ⁴⁵P₆ways

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Your Answer

Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω

1x2 1x3 1x4 1x5 1x6 1x7 2x1 2x2 2x3 2x4 2x5 2x6 2x7 3x1 3x2 3x3 3x4 3x5 3x6 3x7 4x1 4x2 4x3 4x4 4x5 4x6 4x7 5x1 5x2 5x3 5x4 5x5 5x6 5x8 6x1 6x2 6x3 6x4 6x5 6x6 6x7 7x1 7x2 7x3 7x4 7x5 7x6 7x7

1x2 1x3 1x4 1x5 1x6 1x7 2x1 2x2 2x3 2x4 2x5 2x6 2x7 3x1 3x2 3x3 3x4 3x5 3x6 3x7 4x1 4x2 4x3 4x4 4x5 4x6 4x7 5x1 5x2 5x3 5x4 5x5 5x6 5x8 6x1 6x2 6x3 6x4 6x5 6x6 6x7 7x1 7x2 7x3 7x4 7x5 7x6 7x7

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2009-03-17 00:31:33

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