The value of both the angles is 55 degrees. Thus, option (A) is correct.
ABCD is a parallelogram in which the measures of angle D and angle B are given.
The measure of angle D is (3n-5).
The measure of angle B is (2n+15).
Now, we know that the opposite angles of a parallelogram are always congruent to each other.
Therefore,
[tex]\angle B= \angle D\\2n+15=3n-5\\n=20[/tex]
Thus, the value of n is 10.
Now,
[tex]\begin{aligned}\angle B&=2 \times 20+15\\&=55 \end{aligned}[/tex]
[tex]\begin{aligned}\angle D&=3 \times 20-5\\&=55 \end{aligned}[/tex]
Hence, the value of both the angles is 55 degrees. Thus, option (A) is correct.
To know more about the parallelograms, please refer to the link:
https://brainly.com/question/17324177
