A can do th of a work in 4 days and B can do th of the same work in 5 days. In how many days they can finish the work, if they work together?
The lengths of one side of a rhombus and one of the two diagonals are 6 cm each. Find the area of the rhombus (in ).
The area of a rhombus is and the length of one of its diagonals is 8 m. The length of each side of the rhombus will be:
The table below shows that employees in an office , sorted according to their age. Find the median:
Age | Number of workers |
25 - 30 | 4 |
30 - 35 | 7 |
35 - 40 | 8 |
40 - 45 | 10 |
45 - 50 | 9 |
50 -55 | 8 |
Total | 46 |
which of the following is the merits of arithmetic mean
The table classifies 40 persons who took a test according to the marks they scored: Calculate the mean marks scored.
Marks | Persons |
0 - 10 | 4 |
10 - 20 | 6 |
20 - 30 | 16 |
30 - 40 | 8 |
40 - 50 | 6 |
The table shows the number of workers of different categories in an office , grouped according to their daily wages. What is the mean daily wages?
Daily wages(Rs) | Number of workers |
675 | 8 |
730 | 4 |
755 | 4 |
780 | 3 |
840 | 1 |
The ratio of the area (in ) to circumference (in cm) of a circle is 35 : 4. Find the circumference of the circle?