Section 2-2 Exercises: 1. The numbers 1, 2, 20 are written on slips of paper, an

Question

Section 2-2 Exercises: 1. The numbers 1, 2, 20 are written on slips of paper, and one is drawn at random. What is the probability that the number chosen is a prime? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 2. The probability of drawing a blue marble from a jar is 1/6. Which of the following could be the number of marbles in the jar? (a) 309 (b) 621 (c) 142 (d) 312 3. A class has 10 boys (including Jack) and 12 girls (including Jill). (i) Two students are chosen at random to be lunchroom monitors. (a) What is the probability that both are girls? (b) What is the probability that one is a girl and the other is a boy? (c) What is the probability that the two chosen are Jack and Jill? (d) What is the probability that Jack is selected first, then Jill is selected? (ii) Four students are chosen at random to go to the board. (e) What is the probability that at least one boy is chosen? (f) What is the probability that both Jack and Jill are chosen?

Explanation / Answer

Please post 1 question per post as per forum rules:

2. P( drawing a blue marble from a jar) = 1/6

So, total marbles must be a multiple of 6

Here' only 1 answer is a multiple of 6, i.e. 312

d) 312 is CORRECT

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