From 1 to 25: 13 odd numbers, 12 even numbers.
Sum is odd when one number is odd and other is even.
Favorable ways: 13×12=156.
Total ways to choose 2 from 25: (225)=300.
P=300156=2513.
CUET UG 2022 — Mathematics Algebra
If two numbers are selected at random from the first 25 natural numbers, then the probability that their sum will be odd is:
Held on 4 Aug 2022 · Verified 13 Jul 2026.
5013
625156
625312
2513
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