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SAT/ACT Probability Practice
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SAT/ACT Probability Practice
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25 Questions

1.
find x

2. suppose you 'load' a die so that the six comes up twice as often as any other number. what is the probability you roll a six on one roll?

3. find the number of sides of a regular polygon if the interior angles are 108

4. The average of the integers 24, 6, 12, x and y is 11. What is the value of the sum x + y?

5.
find n

6.
find angle 2

7. A total of 120,000 votes were cast for 2 opposing candidates, Garcia and Pérez. If Garcia won by a ratio of 5 to 3, what was the number of votes cast for Pérez?

8. If the function f is defined by f ( x )= 3x + 4, then 2 f ( x)+4=

9. square ABCD sides are 8 in length, square MNOP is formed by connecting the midpoints of the sides of ABCD. a third square if formed by connecting the midpoints of MNOP. what is the ratio of the are of the final square to ABCD.

10. solve: 3x-4y=-5 and x=y+2

11. What is the greatest possible area of a triangle with one side of length 7 and another side of length 10 ?

12. you are buying a cake, there are five chocolate, four carrot, three vanilla, six red velvet. how many of them must you open to ensure you have one of each?

13. if f(x)=3x+1 and f(g(x))=x, what is g(x)?

14.
solve, graph both lines on a coordinate grid to confirm (test requires a picture indicating solution)

15. If 10 + x is 5 more than 10, what is the value of 2x ?

16. a bag of jellybeans has 20 watermelon, 45 sour apple, 30 orange, and 5 coconut. if you pick one, what is the probability it's watermelon

17. you roll two dice, what is the probability the sum of the two numbers will equal 10

18. spam email follows this probability distribution

adult financial health leisure products scams
.145 .162 .073 .078 .21 .142

what is the probability a spam email is not about any of these topics?

19.
The circle graph above shows how David's monthly expenses are divided. If David spends $450 per month for food, how much does he spend per month on his car

20.
If this page was folded along the dotted line in the figure above, the left half of the letter W would exactly coincide with the right half of W. Which of the following letters, as shown, CANNOT be folded along a vertical line so that its left half would coincide with its right half? A I O U E

21. if x is chosen at random from (4,6,7,9,11) and y from (12,13,15,17) what is the probability that xy is odd?

22. a cylinder has an inside height of 6 feet and inside radius of 2 feet. how much water does it contain 2/3's full.

23. In a certain store, the regular price of a refrigerator is $600. How much money is saved by buying this refrig-erator at 20 percent off the regular price rather than buying it on sale at 10 percent off the regular price with an additional discount of 10 percent off the sale price?

24. A parameter is measured during a scientific experiment and the results are -12, 4, -8, 10, 2, 2, 0, -4 and 2. The median and the average of these numbers are:

25. If a is an integer chosen randomly from the set {3, 4, 5, 9} and b is an integer chosen randomly from the set {3, 8, 12, 15}, what is the probability that a/b is an integer?

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