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?

Quiz

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.

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If two integers x, y ( x > y ) are selected from - to ( inclusive ), how many possible cases are there?

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