Question
My grandfather was 7 times older to me 14 years ago. He
would be 3.5 times of my age after 7 years from now. 7 years ago, what was the ratio of my age to that of my grandfather?Solution
Let my age 14 years ago be x years. My grandfather's age at that time = 7x years My present age = (x + 14) years My grandfather's present age = (7x + 14) years According to the question, 3.5(x + 14 + 7) = (7x + 14 + 7) 3.5x + 73.5 = 7x + 21 3.5x = 52.5 x = 15 Now, required ratio = (x + 14 - 7)/(7x + 14 - 7)Â => (15 + 7):(105 + 7) => 11:56Â
The Newton-Raphson method is an iterative technique primarily used for:
Which type of data can be ordered, but the differences between values are not meaningful (e.g., satisfaction ratings: "Good," "Better," "Best")?
The "standard deviation" is the square root of which other statistical measure?
In numerical computing, what type of error occurs when a continuous function is approximated by a discrete sum or a finite number of terms?
Which numerical method approximates the definite integral of a function by dividing the area under the curve into trapezoids?
What does a p-value less than a significance level (e.g., 0.05) typically indicate in hypothesis testing?
Which statistical measure quantifies the average squared deviation of each data point from the mean?
Relevant for Exams:
