Question

Two cards are selected at random from 10 eah
numbered 1 to 10. Find the probability that the sum is
odd if two cards are drawn.​

Answer 1

Answer:

The number of ways of choosing one odd and one even number is

5

C

1

×

5

C

1

=5×5=25

Total number of ways of choosing 2 cards out of 10=

10

C

2

=45

Thus, probability =25/45=5/9