Question

If 5pr=120 the value of r is

Answer 1

Answer:

24/p

Step-by-step explanation:

5pr=120

r=120/5p

r=24/p

Answer 2

Answer:

r = 4 or 5

Step-by-step explanation:This question is of permuttions and combinations !!! Taught in class 11 !!!

5Pr=120

5!/(5-r)!=120

5!/(n-r)!=5!

therefore r = 4 or r= 5!!!