Question 50
Permutation and CombinationIf 6Cr/6Pr = 1/6, find the value of r
- A.1
- B.3
- C.5
- D.6
Show the answer and explanation
Answer: B (3)
Explanation
ⁿCᵣ = ⁿPᵣ/r!, so the ratio is 1/r! = 1/6. Since 3! = 6, r = 3.
If 6Cr/6Pr = 1/6, find the value of r
Answer: B (3)
ⁿCᵣ = ⁿPᵣ/r!, so the ratio is 1/r! = 1/6. Since 3! = 6, r = 3.