Out of 40 consecutive integers, two are chosen at random. Find the probability that their sum is odd?	Choose the correct option
A) 21/40 B) 19/39 C) 21/39 D) 20/39 E) 23/39
Explanation :   Forty consecutive integers will have 20 even and 20 odd integers. The sum of 2 chosen integers will be odd, only if:   First is even and second is odd   First is odd and second is even   Mathematically the probability will be given by:   P(First is even) * P(Second is odd) + P(First is odd) * P(Second is even)   = (20/40) * (20/39) + (20/40) * (20/39)   = 20/39   Answer : 20/39
<result>D</result>
Out of 40 consecutive integers, two are chosen at random. Find the probability that their sum is odd?