Question

if 10 cr =10cr+4 then find 5pr
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Answer 1

Step-by-step explanation:

Given If 10 C r = 10 C r + 4 then find 5 P r

• We have n C p = n Cq or p + q = n
• Now 10 C r = 10 C r+ 4
• So r + r + 4 = 10
• Or 2r + 4 = 10
• Or 2r = 6
• Or r = 6 / 2
• Or r = 3
• So we have n P r = n! / (n – r)!
• Now 5 P 3 = 5! / (5 – 3) ! (since r = 3)
•                  = 5 x 4 x 3 x 2 x 1 / 2 x 1
•                 = 60

Reference link will be

https://brainly.in/question/6554889

Answer 2

Answer:

60will be the correct answer