Answer:
The expression is, B)
Step-by-step explanation:
Since, the sum of an A.P. is,
Where, n is the number of terms,
a is the first term of the A.P. ,
is the last term of the A.P. ,
Here, we have given,
a = 102, = 159, and n = 20,
Thus, the sum of the given A.P. is,
Which is the required expression.
