- A625
- B1225
- C300
- D600
Step-by-Step Solution
Even sum needs both even or both odd. There are 25 of each: gives an odd sum.)
Answer: D) 600
Roll numbers in a class run from 1 to 50. For a pair activity, the class monitor wants two students whose roll numbers add up to an even total. How many such pairs can be formed?
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