THe probability that a married woman watches a certain tv show is 0.4, and the probability that her wife watches the show is 0.5. The TV viewing habits of a husband and wife are clearly not independant (why??). In fact, the probability that a married woman watches the show given that her husband does is 0.7. FInd the probability that:

a. Both husband and wife watch the show.

b. The husband watches the show given that his wife watches it.

I'm having trouble with this, and distinguishing between independent and conditional events. Thanks!