Pls show steps using as a study guide / tips on how to easily solve these problems thanks

g) Decide whether the events w and M independent? Explain your decision. Each question in a ten-question multiple-choice quiz has four choices, only one of which is correct. If a student guesses at all ten questions, find the probability that at most two questions will be wrong. 9. The yearly income for a group of 10,000 people is normally distributed with mean $60.000 and standard deviation $5000. (a) What is the probability that the person from this group has a yearly income less than $45, 000? (b) How many of these people have yearly incomes over $70, 000