Ratio and Proportion: 0.5:20:: X: 200
X=5
X=50
X=4
X=25
Correct Answer : A
The ratio 0.5:20=X:200 to proportion equation becomes
\(\frac{0.5}{20}=\frac{X}{200}\)
Cross-multiply to find the value of X
\(0.5\ast200=20x\)
\(100=20x\)
Divide both sides by 20 to find the value of X
\(\frac{100}{20}=\frac{20x}{20}\)
\(5=x\)
Thus, the value of X is 5.
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Correct Answer is B
Explanation
Use the relation 1 gallon= 128 fluid ounces to convert between gallons and ounces. Then,
\(576\ fluid\ ounces\ast\frac{1 gallon}{128 fluid ounces}=4.5 gallons\)
Correct Answer is A
Explanation
Use the relation 1 gallon =128 ounce to change 3 gallons to ounces as follows
\(\frac {3\ gallons \ast 128 ounces}{ 1 gallon}=384 ounces\)Thus, 3 gallons is equal to 384 oz.
Correct Answer is ["52"]
Explanation
First determine the number of classes in a population of 6734 students
\(6734\ students\ast\frac{1 class}{25 students}\ =\ 269.36 classes\)
There are about 269 classes and if we assume 1 class to be taught by 1 teacher, then the number of teachers to be hired is:
Number of teachers to be hired = 269 - 217 = 52 teachers
Correct Answer is ["8"]
Explanation
Since the time of comparison is 24 hours in both cases, the number of chickens is determined using the following relation
\(\frac{24\ eggs\ast2 chickens}{6 eggs}=8 chickens\)It will take24\ eggs\ast2 chickens6 eggs=8 chickens 24 hours to lay 24 eggs
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