JEE Mathematics Online Test Probability Set B

There are two dice A and B both having six faces. Die A has 3 faces marked with 1, 2 faces marked with 2 and 1 face marked with 3. Die B has 1 face marked with 1, 2 faces marked with 2 and 3 faces marked with 3. Both dice are thrown randomly once. If E be the event of getting sum of the numbers appearing on top faces equal to x and P(E) be the probability of event E, then

When x = 4, then P(E) is equal to