Answer:
B. 70
Step-by-step explanation:
We have the sum given by [tex]\sum_{i=1}^{5}(i+11)).[/tex]
Now, we open the summation by substituting the values of 'i',
i.e. [tex]\sum_{i=1}^{5}(i+11)).[/tex] = (1+11) + (2+11) + (3+11) +(4+11) +(5+11)
i.e. [tex]\sum_{i=1}^{5}(i+11)).[/tex] = 12 + 13 + 14 + 15 + 16
i.e. [tex]\sum_{i=1}^{5}(i+11)).[/tex] = 70.
Hence, the sum of [tex]\sum_{i=1}^{5}(i+11)).[/tex] is 70.
So, option B is correct.
