A vase contains five balls nummered 1 to 5. Two balls are pulled out blindly without putting them back.
a. What are the chances that both have an even number?
b. Calculate the probability that the sum of the two numbers is even.
c. Instead of two balls, three balls are now pulled from the vase, still without putting back. What is the product distribution of the numbers?
(Thank you in advance, if something's not clear please let me know because I'm not a native English speaker and may have mistranslated it.)
