Thanks a lot for your wishes,guys! Since yesterday, I have been still trying to figure out the possible reasons. I think that since there are 6-10 experimental questions on each of the two sections, there's a good probability that the questions which I might have gotten wrong would mostly have been...

Probability

Hi, can someone explain to me how to work on this two problems? I tried to work on them but I cant find the right answer. There are 3 red balls, and 2 black balls in a jar. What is the probability that John gets at least one red ball when he picks two balls at random out of the jar at the same time?...