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Probability and Solving for a variable

  •  English    16     Public
    Finding the probability and solving for a variable.
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  • Maggie saw 14 labs, 7 terriers and 9 boxers run by her at the dog park. What is the experimental probability that the next dog that runs by her will NOT be a lab?
    16/30 = 8/15
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  • The experimental probability that the wind will blow over 20 mph in the month of March is 20%. In the next 30 days, how many days can we expect the wind to blow over 20 mph?
    6 days
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  • Connor makes one-fourth of his shots in the goal. Could a 12, equal section spinner be used to develop a simulation for this situation? If yes, explain how. If no, explain what could be used instead.
    Yes, because 1/4 is equal to 3 out of 12, so the 12 sections can be broken into 4 equal parts to show 1/4.
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  • An ice cream shop offers 6 different kinds of yogurt, 3 different sizes of a bowl, and 8 different toppings. How many different yogurt choices with one kind of yogurt, one size and topping are possible?
    144 different choices
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  • The enrollment of a middle school is shown in the table. What is the experimental probability the next student to enroll will be a male 7th grader? Asher thinks that the next student to enroll will likely be female. Do you agree? Explain.
    92/600 = 23/150; No, the experimental probability of a male is 301/600 and female is 299/600.
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  • Cole has 35 country songs, 30 heavy metal songs, and 25 rap songs on his playlist. Cole listened to his music when he rode his dirt bike and counted 5 rap songs. How many songs total would Cole have probably heard?
    18 songs
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  • A 4-digit code can use the letters X or Y. Any of the letters can be repeated. What is the probability that the code is XXXX?
    1/16
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  • Sasha knows that 2 out of every 5 of her mugs are slightly cracked. She has 10 mugs. What is the probability the first two mugs she grabs without looking will have cracks in them?
    2/15
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  • Solve the equation. -34x - 24 = -10x + 12
    x = -1.5
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  • Solve the equation. -10x + 36 = -22x - 12
    x = -4
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  • Sangam knows that 2 out of every 6 of his mugs are slightly cracked. He has 12 mugs. What is the probability the first two mugs she grabs without looking will have cracks in them?
    1/11
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  • A 6-digit code can use the letters X or Y. Any of the letters can be repeated. What is the probability that the code is YYYYYY??
    1/64
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  • Courtney has 31 country songs, 35 heavy metal songs, and 18 rap songs on her playlist. Courtney listened to her music when she rode her dirt bike and counted 3 rap songs. How many songs total would Courtney have probably heard?
    14 songs
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  • The enrollment of a middle school is shown in the table. What is the experimental probability the next student to enroll will be a female 7th grader?
    76/600 = 19/150
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  • The experimental probability that the wind will blow over 20 mph in the month of April is 30%. In the next 30 days, how many days can we expect the wind to blow over 20 mph?
    9 days
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  • Marshal saw 12 labs, 10 terriers and 8 boxers run by her at the dog park. What is the experimental probability that the next dog that runs by him will NOT be a boxer?
    22/30 = 11/15
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