Question
Ravi can finish a task in 18 days. If Ravi and Rohan
work together, they can complete the task in 10 days. How many days would Rohan alone take to finish the work?Solution
ATQ,
Let the total work be 90 units {LCM (18 and 10)}
Efficiency of Ravi = (90/18) = 5 units/day
Efficiency of Ravi and Rohan together = (90/10) = 9 units/day
Efficiency of Rohan = 9 - 5 = 4 units/day
Time required by Rohan to complete the work alone = (90/4) = 22.5 days
Which of the following techniques is most suitable for handling and organizing an unstructured dataset with textual data?
In Python, which library is most commonly used for data manipulation?
You are analyzing sales data and notice missing values in some of the records. What is the most appropriate first step to take during the data analysis ...
What does the Dickey-Fuller test primarily assess in a time series dataset?
In regex, ^abc matches:
Which of the following methods is most effective in reducing selection bias during the sampling process?
Which of the following Python libraries is most appropriate for creating statistical visualizations such as violin plots and heatmaps?
An e-commerce company wants to understand the trend of holiday season sales over the past decade to forecast future sales. Which analysis method should ...
Given the following SQL query:
SELECT department _ id, COUNT(*) AS employee _ count
FROM employees
GROUP BY department_id
HA...
Which data modeling technique is used to represent the relationships between entities in a database?
Relevant for Exams:
