If two integers x, y (x>y) are selected from -10 to 4 (inclusive), how many possible cases are there...
If two integers x, y (x>y) are selected from -10 to 4 (inclusive), how many possible cases are there?
Answer/Solution
105
Steps/Work
If two integers x, y (x>y) are selected from -10 to 9 (inclusive), how many possible cases are there?
A. 150
B. 180
C. 190
D. 210
E. 240
--> 15C2=15*14/2=105. Therefore, the answer is E.
A. 150
B. 180
C. 190
D. 210
E. 240
--> 15C2=15*14/2=105. Therefore, the answer is E.