Five school buses carry students from the main campus to Novotel Hotel to attend paying homage ceremony. Each bus carries 50,55,60,65 and 70 students respectively. One of these students and one bus driver are picked at random.

(a) What is the expected number of students sitting in the same bus that carries the randomly selected student?

(b) Let be the number of students in the same bus as the randomly selected driver. Is [ ] larger than the expectation obtained in the previous question?

Analyse events using the probability theory and probability distributions.

pls don't ues notebook because i don't understend handwriting thanks. And Explain step by step thanks.