At a 24-hour movie theatre, customers arrive at a rate of 10 customers per hour. Any given customer will independently buy a ticket for one of the following movie genres with corresponding...

At a 24-hour movie theatre, customers arrive at a rate of 10 customers per hour. Any given customer will independently buy a ticket for one of the following movie genres with corresponding probabilities:Action, 0.4Romance, 0.3Horror, 0.2Comedy, 0.1

Given there were 300 customers today, how many bought a romance movie ticket?

Find the expected value.