Percentages - high school - practice problems
Number of problems found: 588
- Circumference 5493
By what percentage will the area of a square decrease if its circumference decreases by 17 percent? - Percentage increase
Increase the number 400 by 3.5% - 100% 8374
28 is 100% 13 is x% - A perineum
A perineum string is 10% shorter than its original string. The first string is 24. What is the 9th string or term? - Square
If we increase the side of the square, increase its area of 91%. What is the percentage we increase the side of the square? - Bulbs
The probability that the bulb can operate 4000 hours is 0.3. What is the probability that exactly one of the eight bulbs can operate 4000 hours? - Three dice
What is the probability that when we roll three dice, we roll the number 1,2,3? - Hearts
3 cards are chosen from a standard deck of 52 playing cards (13 hearts) with replacements. What is the probability of choosing 3 hearts in a row? - Events
Event U has the probability of 0.89. What is the probability that the event U occurs in 4, 2, 8 try? - Three colors
Find the probability that three balls of the same color will be drawn from fate with ten white, ten red, and ten blue balls. - Mixed with percentages
Calculate 33 1/3% of 570. - In 1970
In 1970 the population was 24,000. In 1980 the population was 28,800. By what percent did the population increase? - Find median
What is the median value in this list? 6/10,1/2,0.9,75%,0.03 - Kerosine and petrol
If 4 liters of petrol containing 15% kerosine are added to another 7 liters of petrol containing 10% kerosine, what percentage of the petrol is kerosine? - Calculate 13631
Calculate 1.5 ‰ out of 85% out of 240 - Percentage 5834
There are 1.5 times more women than men in the theater. What percentage of women are more than men in the theater? - IQ scores
IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What percentage of the population scores higher than 125 on an IQ test? - Discrete and continuous
2,3,4,4,5,5,5,6,6,7 Assume the scores are measurements of a Discrete variable and find the median. Assume the scores are measurements of a continuous variable and find the median by locating the precise midpoint of the distribution. - Percentage 23501
In 7A class, the number of boys to girls is a ratio of 2:3. What percentage in the class are girls? - A frequency
A frequency table of grades has five classes (A, B, C, D, F) with frequencies of 2,14,13,8, and 1, respectively. Using percentages, what are the relative frequencies of the five classes?
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