1.

Find m and n if P(m+n,2)=56,P(m-n,2)=12

Answer»

SOLUTION :`""^(m+n)P_2=56,""^(m-n)P_2=12`
`or,((m+n)!)/((m-n-2)!)=12`
`or,(m+n)(m+n-1)=8xx7`(m-n)(m-n-1)=4xx3`
`:. (m+n)=8 ,m-n=4`
`:. M=6,n=2`


Discussion

No Comment Found

Related InterviewSolutions