Calculating the Probabilities Related to the Ticket Class

pop_first = train[train.Pclass.eq(1)]
surv_first =  round(len(pop_first[pop_first.Survived.eq(1)])/len(pop_first), 2)
p_first = round(len(pop_first)/len(train), 2)
pop_second = train[train.Pclass.eq(2)]
surv_second =  round(len(pop_second[pop_second.Survived.eq(1)])/len(pop_second), 2)
p_second = round(len(pop_second)/len(train), 2)
pop_third = train[train.Pclass.eq(3)]
surv_third =  round(len(pop_third[pop_third.Survived.eq(1)])/len(pop_third), 2)
p_third = round(len(pop_third)/len(train), 2)
print("First class: {} of the passengers, survived: {}".format(p_first,surv_first))
print("Second class: {} of the passengers, survived: {}".format(p_second,surv_second))
print("Third class: {} of the passengers, survived: {}".format(p_third,surv_third))