The average mark of 10 students in Group A is 26 and that of 10 students in Group B is 36. What is the combined average mark of both groups?
Combined average = (10*26 + 10*36) / 20 = 31.0.
A can finish a task in 14 days and B in 24 days. Working together, how many days will they take to complete the task? (Round to 2 decimal places)
$Time = (14 * 24) / (14 + 24) = 8.84 days.$
An item with cost price Rs. 4900 is sold at a profit of 13%. What is the selling price in rupees?
$Selling Price = 4900 * (1 + 13/100) = Rs. 5536.$
Find the remainder when 653 is divided by 13.
653 = 13 * 50 + 3.
The average mark of 10 students in Group A is 20 and that of 10 students in Group B is 30. What is the combined average mark of both groups?
Combined average = (10*20 + 10*30) / 20 = 25.0.