Question

We have an arithmetic series

The first term =  98 - 2(1) = 96

The 11th term is   98 - 2(11) = 76

The sum is given by :

[ first term + 11 term ] * ( number of terms) / 2  =

[ 96 + 76 ] ( 11) / 2  =

172 * 11/ 2  =

(172 / 2 ) * 11 =

(86) * 11

946