Question
Four years ago, A’s age was 11 years less than 1.2 times
his current age. The ratio of B’s age after 6 years to C’s age 1 year ago is 4:1. What is B’s present age, if C is 50% less than A?Solution
ATQ,
Let the present age of A, B and C be ‘a’, ‘b’ and ‘c’ years respectively.
a – 4 = 1.2 × a – 11
0.2 × a = 7
a = 7 / 0.2
a = 35 years
So, age of c = 35 × 0.5 = 17.5 years
Also, (b + 6)/(c – 1) = 4/1
b + 6 = 4 × (17.5 – 1) = 4 × 16.5 = 66
b = 66 – 6 = 60 years
Which of the following scenarios is best suited for web scraping as a data collection method?
Which of the following best describes the purpose of data wrangling?
Which of the following query will return the third-highest salary from an Employee table in SQL?
Which of the following strategies is most effective in avoiding selection bias when choosing a sample for analysis?
In developing a fraud detection model for online transactions, a data analyst should use a technique capable of identifying anomalous patterns. Which of...
Which type of analysis examines historical data to identify patterns?
Which approach is most effective in leveraging data for fraud detection in financial transactions?
In artificial intelligence, what is the primary advantage of using a convolutional neural network (CNN) over a traditional multi-layer perceptron (MLP) ...
Which machine learning model is most appropriate for detecting spam emails, considering its ability to handle high-dimensional data and probabilistic pr...
Why is metadata crucial in the management of data?
