Mathematics quiz on Ratio and Proportion (11-12-2020)

In a bank ratio between the number of officers to clerks is 9: 5. One certain day 10 clerks and 12 officers were absent due to bad weather and the ratio between officers and clerk became 11: 5. What is the actual number of clerks in the bank?

A women distributed her saving between her daughter X, Y and Z in the ratio 6: 7: 11. If Y gives Rs. 700 from her share to X, the ratio of share of X, Y and Z becomes 5: 4: 3. What is the average sum of share (in Rs) of X and Y, in the beginning?

A sum is divided among 120 boys and some girls in the ratio 15: 21. If each boy gets Rs. 5 and each girl get Rs. 4, then the number of girls is:

Monu and Gopal invest some money in a business in the ratio of 9: 11. If the total money invested is Rs. 6480. Find how much amount Gopal invested more than Monu?

Rahul ordered pizzas of small, medium and large sizes for 18 persons, one slice per person. Each size contains different numbers of slices and the ratio of their slices is 2: 3: 4. If each slice is of 40 gm and the price of a smaller pizza is Rs. 320, find the price and weight of a total pizza.

If a, 5, 20, b is in the continued proportion then, find a and b.

Find the third proportional to 4, 26 .

What number must be added to each of the number 3, 12, 20 and 32 to make them proportional.

What is the ratio whose terms differ by 50 and the measure of which is

Find the mean proportion of 14.4 and 16.9 .