Answer:
-86
Step-by-step explanation:
12 - -7^2(2)
12 - 49(2)
12-98
-86
First, you multiply 98*21 which equals 2058. Then, you multiply 2058 times 65 which equals 133770 and there's your answer.
Given:
and
.
To find:
The combinations without repetition are possible if
and
.
Solution:
Combination of selecting r item from total n items is:

We have
and
. By using the above formula, we get



Therefore, the correct option is D.