If n+1C3 = 2(nC2), find the value of n.

Given: n+1C3 = 2(nC2) Need to find: Value of n ⇒ n+1C3 = 2(nC2) ⇒ ⇒ ⇒ [As ]

Q8 of 68 Page 347

If ⁿ⁺¹C₃ = 2(ⁿC₂), find the value of n.

Given: ⁿ⁺¹C₃ = 2(ⁿC₂) Need to find: Value of n ⇒ ⁿ⁺¹C₃ = 2(ⁿC₂) ⇒ ⇒ ⇒ [As ]

If ^mC₁ = ⁿC₂ prove that m = n(n – 1).

Write the value of (⁵C₁ + ⁵C₂ + ⁵C₃ + ⁵C₄ + ⁵C₅).

If ⁿP_r = 720 and ⁿC_r = 120 then find the value of r.

If ^(n2–n)C₂ = ^(n2–n)C₄ = 120 then find the value of n.