22p_(2+1):20p_(272)=11:52

If 22P_(r+1):^(20)P_(r+2)=11:52, find r

If ""^(22)P_(r+1):^(20)P_(r+2)=11:52, find r.

If 22P_(r+1):^(20)P_(r+2)=11 : 52 ,find r

If ^(22)P_(r+1) : ^(20)P_(r+2)=11 : 52 ,find r

If ""^(22)P_(r+1):""^(20)P_(r+2)=11:52, find r.

(a) If .^(22)P_(r+1):^(20)P_(r+2)=11 : 52 , find r. (b) If .^(56)P_(r+6):^(54)P_(r+3)=30800: 1 , find r.

(a) If .^(22)P_(r+1):^(20)P_(r+2)=11 : 52 , find r. (b) If .^(56)P_(r+6):^(54)P_(r+3)=30800: 1 , find r.

Let x_(1), x_(2), …… , x_(n) be in an A.P. If x_(1) + x_(4) + x_(9) + x_(11) + x_(20) + x_(22) + x_(27) + x_(30) = 272 , then x_(1) + x_(2) + x_(3) + ...... + x_(30) is equal to