Subject: Mathematics
Book: Maths Mastery
A weighted average accounts for varying importance (weights) of different data points. The formula is Σ(value × weight) ÷ Σ(weight). For example, if exam 1 is worth 30% and exam 2 is worth 70%, with scores of 80 and 90, respectively, the weighted average is (80×0.3 + 90×0.7) = 24 + 63 = 87. Weighted averages are prevalent in GPA calculations, composite ratings, and financial indexes. They allow more significant or influential components to sway the overall average accurately. Proficiency with weighting data fosters a fair representation of complex datasets in real-world analysis.
If a person can type 45 words per minute, how many words can they type in 2 hours?
View QuestionWhat is the area of a sector of a circle with radius 14 cm and central angle 90°?
View QuestionA sum of money doubles itself in 5 years at simple interest. What is the rate of interest?
View QuestionIf the average of five consecutive odd numbers is 25, what is the largest number?
View QuestionThe sides of a triangle are 7, 24, and 25. Is this a right triangle?
View QuestionIf a:b = 7:9 and b:c = 5:6, what is a:c?
View QuestionA car travels 240 km in 4 hours. What is its average speed?
View QuestionThe probability of getting an even number when rolling a die is:
View QuestionIf a + b = 10 and ab = 21, what is the value of a^2 + b^2?
View QuestionWhat is the square root of 0.25?
View Question