IDNLearn.com offers a reliable platform for finding accurate and timely answers. Join our community to receive timely and reliable responses to your questions from knowledgeable professionals.

An urn contains three red marbles and four blue marbles. One marble is selected at random, its color is noted, and it is returned to the urn.
Another marble is then selected. What is the probability that the second marble drawn is red?
A.1/2
b:1/7
c:2/7
d:3/7