1. A secretary has three telephones on her desk, each with a different number, and none is an extension. During a 15-second interval the probability that phone 1 will ring is 0.35, that phone 2 will ring is 0.06, and that phone 3 will ring is 0.1. Find the probability that at least one phone will ring. ???

2. A committee of four people is to be formed from six doctors and eight dentists. Find the probability that the committee will consist of one doctor and three dentists. ??? 3.If a coin is tossed twice, what is the probability of getting a head on the second toss if the outcome on the first toss is also a head? 4.A box contains 2 red, 3 white, and 4 blue balls. If 3 balls are drawn at succession without replacement, determine the probability that all are blue. 5.McGyver is faced with the problem of opening a safe with 10 buttons numbered from 0 to 9. The safe can be opened by pressing three buttons, not necessarily distinct, in correct order. Realizing that the probability of getting the right combination is too small McGyver thought of a way of swinging the odds in his favor. He pulverized the lead from a pencil and blew the powder onto the buttons, revealing three buttons that have been pressed many times before. What is the probability that McGyver will be able to open the safe in a single trial? 6.A bowl contains 15 red beads, 30 white beads, 20 blue beads, and 7 black beads. If one of the beads is drawn at random, what is the probabilities that it will be not black? 7.A box contains 2 red, 3 white, and 4 blue balls. If 3 balls are drawn at succession without replacement, determine the probability that first two are blue and the last is white. 8.A secretary has three telephones on her desk, each with a different number, and none is an extension. During a 15-second interval the probability that phone 1 will ring is 0.35, that phone 2 will ring is 0.06, and that phone 3 will ring is 0.1. Find the probability that none of the phones will ring. 9.If three of twenty tires are defective and four of them are randomly chosen for inspection, what is the probability that one of the defective tires will be included? 10.McGyver is faced with the problem of opening a safe with 10 buttons numbered from 0 to 9. The safe can be opened by pressing three buttons, not necessarily distinct, in correct order. What is the probability that McGyver will hit the right combination? 11. What is the probability of drawing a number less than 3 when a die is rolled? 12. A committee of four people is to be formed from six doctors and eight dentists. Find the probability that the committee will be composed of all dentists. 13. A bowl contains 15 red beads, 30 white beads, 20 blue beads, and 7 black beads. If one of the beads is drawn at random, what is the probabilities that it will be red? 14. A committee of four people is to be formed from six doctors and eight dentists. Find the probability that the committee will consist of three doctors and one dentist. 15. A box contains 2 red, 3 white, and 4 blue balls. If 3 balls are drawn at succession without replacement, determine the probability that one for each color (red, white, blue - in this order). 16. If an airline's records show (over a period of time) that 468 of 600 of its jets from San Francisco to Phoenix arrived on time, what is the probability that any one of the airline's jets from San Francisco to Phoenix will not arrive on time? 17. A committee of four people is to be formed from six doctors and eight dentists. Find the probability that the committee will consist of three doctors and one dentist. 18. A committee of four people is to be formed from six doctors and eight dentists. Find the probability that the committee will consist of two doctors and two dentists. 19. What is the probability of drawing an ace from a deck of 52 cards? 20. A committee of four people is to be formed from six doctors and eight dentists. Find the probability that the committee will be composed of all doctors. 21. A secretary has three telephones on her desk, each with a different number, and none is an extension. During a 15-second interval the probability that phone 1 will ring is 0.35, that phone 2 will ring is 0.06, and that phone 3 will ring is 0.1. Find the probability that all three phones will ring. 22. If the probabilities are, respectively, 0.92, 0.33 and 0.29 that a person vacationing in Boracay , will visit Palawan, or both, what is the probability that a person vacationing there will visit at least one of the two areas? 23. In drawing a card from a deck of 52 well-shuffled, what is the probability of drawing a face card given that it is red? 24. A bowl contains 15 red beads, 30 white beads, 20 blue beads, and 7 black beads. If one of the beads is drawn at random, what is the probabilities that it will be white or black? PLEASE ANSWER :D THANK YOU