Leo takes 30 minutes to eat dinner, 50 minutes to change clothes, in 20 minutes to walk to practice. if leo needs to be at hockey practice at 7: 15 p. m., what time does he need to begin?

Idon't want to fail summer school.the probabilities of contamination in medicine capsules due to the presence of heavy metals and different types of microbes are given in the table.the probability of capsule b having microbial contamination is (the same as, greater than, less than) the probability of capsule d having it.