20. A bag oontains 4 red and 6 blue marbles. Two marbles are drawn at random from the bag. and the rst marble is not replaced before the seoond marble is drawn. The probability of drawing two red marbles is 3 ICE Questions 21. Eileen estimates that her probability of passing biology is 0.?0 and her probability of passing chemistry is 0.60. Assuming that these are independent events, the probability that Eileen will pass biology and fail chemistry, to the nearest hundredth, is E] 0.18 C] 0.42 UUESIIOHS 22. In a study on eld mice, 55% have blue eyes, 35% have a short tail and 30% have both blue eyes and a short tail. What is the probability that a randomly selected mouse from this study has neither blue eyes nor a short tail? l E] 0.70 | D 0.65 x E] 0.45 l C] 0.40 Use the following infonnation to answer the next question Data collected on the ages of 35 students in a classroom is shown below. \" Number of Males Number of Females Illlllllllll \" 25. One student from the class is chosen at random to be the lunch monitor. The Odds in Favour that the student will be 19 years of age, can be expressed in the form a:b. The values of a and b are, respectively, and [Record your answer in the numerical-response section below.) WWWDQQD Use the following information to answer the next question A substitution cipher is a systematic method of creating codes where one letter of the alphabet is used in place of another letter. In one particular code the word CAT can be encoded as YWP and the word DESK can be encoded as ZAOG. An alphabet wheel such as the one shown below can be used to aid the encoding of words with a substitution cipher. YZABC X D W m H R PONMI K 4. Using the same coding scheme MATH can be encoded as O IEXL O QWPD O QEXL O IWPDDuestions Q. In a geography class: F students are scheduled to give their presentations today. One student has to leave early for an appointment, so he Will present rst. The number of different ways there are to schedule all of today's presentations is scan El 40 32o E] 1"2D The digits 6, 2, 3 and 8 are each written on a separate sheet of paper. The number of 2-digit or 3-digit numbers that can be created by rearranging the sheets of paper is El 233 J W 0') Use the foiiowing information to answer the next question Eve can choose from the following notebooks: - lined page notebooks come in red, green, blue, and purple - graph paper notebooks come in orange and black 12. How many different colour variations can Eve choose if she needs one lined notebook and one graph paper notebook? DB C16 D16 The odds against Marcy passing her driver's test on the first try are 1:5. The probability of her passing her driver's test on the first try, to the nearest hundredth is (Record your answer in the numerical-response section below.) Your answer:4. Michael is a light bulb inspector. Out of every 10 light bulbs, he nds that T are of good quality and 3 have a defect. If Michael selects 1 light bulb at random, the probability that it is not defective is sol-1
