Probability test question

I had this question on a test:

The probability of snowing in one city is 0.4, and the probability of snowing in another city is 0.7. Assume independence. What is the probability that it snows in **exactly one **of the two cities?

The way I approached it was to say that the probability that it snows in **exactly one **of the two cities is:

Let A denote probability of snow in the first city.

Let B denote probability of snow in the second city.

P(A and 'not B') or P('not A' and B) = (0.4)(0.3) + (0.6)(0.7) - (0.4)(0.3)(0.6)(0.7) = 0.4896

Is this correct?