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am2garcia5
17.07.2019 •
Mathematics
Check my answers, .q #1 • you spin the spinner below once. what is the sample space? a. {1}b. {1,2,3,4}c. {1,2,3,4,5,6,7,8,9,10}d. {1,2,3,4,5,6,7,8} (i chose this one)q #2 • you spin the spinner below once. what is the probability that the arrow will land on 3? a. 1/4b. 8c. 1/8 (i chose this one)d. 3/8q #3 • you spin the spinner below once. what is the probability that the arrow will land on an even number? a. 1/2 (i chose this one)b. 3/8c. 1/4d. 1/8q #4 • a bag contains 3 red marbles, 5 yellow marbles, and 4 blue marbles. one marble is chosen at random. what is the probability that the chosen marble will be blue? a. 1/3 (i chose this one)b. 1/12c. 3/4d. 1/4q #5 • a bag contains only red marbles and white marbles. tanya reached into the bag without looking, got 40 marbles, and found that 24 of the marbles were red. tanya is going to reach in the bag again and get one more marble. what is the experimental probability that the marble will be red? a. 1/2b. 3/5 (i chose this)c. 3/4d. 2/5
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Ответ:
Problem 1: There are 8 spaces labeled 1 though 8 so the proper sample space is {1,2,3,4,5,6,7,8} which is basically all the possible outcomes
Problem 2: There is one "3" out of 8 total, so 1/8 is the probability of landing on 3
Problem 3: There are 4 spaces that are even {2,4,6,8} out of 8 total {1,2,3,4,5,6,7,8}. So 4/8 = 1/2
Problem 4: There are 4 blue out of 3+5+4 = 12 total, so 4/12 = 1/3
Problem 5: We got 24 red out of 40 total, so 24/40 = 3/5
Ответ: