Kindly share the step by steps with formula (no internet and no website)

Question -1

Three messenger services deliver to a small town in Oregon. ServiceAhas 60% of all the scheduled deliveries, serviceBhas 30%, and serviceChas the remaining 10%. Their on-time rates are 80%, 60%, and 40% respectively.

a. What proportion of the packages in the town are delivered on time?

b. A package arrived on time. What is the probability it was delivered by service B?

c. A package arrived on time. What is the probability it was delivered by service A?

d. You give your package to service C. What is the probability it'll be delivered late?

Question- 2

Joe moves to Portage county where 20%of the residents are drug users. Joe is given a drug test.The test correctly identifies users 95% of the time. The test correctly identifies nonusers 90% of the time. If Joe tests positive, what's the probability he is a drug user?

Question -3

( 1) Two events Cand M collectively exhaust a random experiment. It probability of event C is 0.35, what is the probability of M ? a ) Exactly 016 5 More than on equal O'Ge () less than on equal to 0.6 8 do sufficient information not provided ( e) Ph.D graduate has applied for jobe at college A and B. Probabilility of getting a jobbat college A is shy. and vellege B is 601%, it the gets an offers from college B there is 801 chance the will get offer from college A. Part 1) what is the probability that the will get offers from both colleges Part 2 ) what is the probability that the will get atleast I offer from collegeFor an interview, 79% applied candidates are bemale. 841 of the female have college degree while only 5p7"/ of the males have college degree . al, If you select a candidate at random, what is the probability that it is male with a college degree? Q2 . If you select a candidate at random, what sis the probability that they have a college degree? 13. If a candidate selected has a college degree what are the chances that candidate is female