Question:easy
A bakery opened with its daily supply of 40 dozen rolls. Half of the rolls were sold by noon, and 60% of the remaining rolls were sold between noon and closing time. How many dozen rolls were left unsold?
A bakery opened with its daily supply of 40 dozen rolls. Half of the rolls were sold by noon, and 60% of the remaining rolls were sold between noon and closing time. How many dozen rolls were left unsold?
Show Hint
First find how many dozen remain after the noon sale, then take 60% of that as sold and subtract.
Updated On: Jul 15, 2026
- 6
- 8
- 10
- 12
Show Solution
The Correct Option is B
Solution and Explanation
This can also be solved by tracking the unsold percentage directly instead of subtracting sold amounts at each step.
After the noon sale, 50% of the rolls remain unsold, since exactly half were sold.
Of that remaining 50%, 60% gets sold between noon and closing, which means $100\% - 60\% = 40\%$ of that remaining portion stays unsold.
So the fraction of the original 40 dozen still unsold at closing is:\[0.40 \times 0.50 = 0.20\]This means 20% of the total 40 dozen rolls remain unsold:\[0.20 \times 40 = 8 \text{ dozen}\]\[\boxed{8 \text{ dozen}}\]
After the noon sale, 50% of the rolls remain unsold, since exactly half were sold.
Of that remaining 50%, 60% gets sold between noon and closing, which means $100\% - 60\% = 40\%$ of that remaining portion stays unsold.
So the fraction of the original 40 dozen still unsold at closing is:\[0.40 \times 0.50 = 0.20\]This means 20% of the total 40 dozen rolls remain unsold:\[0.20 \times 40 = 8 \text{ dozen}\]\[\boxed{8 \text{ dozen}}\]
Was this answer helpful?
0
Top Questions on Percentage
- A bought a phone from a store and paid \(\frac{1}{6}\) of the price using UPI, \(\frac{1}{3}\) of the price in cash, and the remaining balance a year later. He also paid 10% interest on the remaining balance after one year. What was the original price of the phone?
- Given \(A=x+y^2+z^3\). If x increases by 6300%, y increases by 700% and z increases by 300%, then what is the percentage increase in the value of A?
- IBSAT
- Quantitative Aptitude
- Percentage
- The populations of two cities X and Y is equal. The population of city X increases in two successive years by 15% and 20% respectively and that of city Y increases successively by 10% and 30% respectively. If the difference in the population of two cities after 2 years is 55,980, then what was the total population of the two cities initially?
- IBSAT
- Quantitative Aptitude
- Percentage
- A trader buys 240 watches for ` 50,400 and he marks each of them at ` 320. He gives a discount of 15% on each watch and gives 1 watch free on a purchase of 5 watches. What is his minimum possible overall percentage of profit?
- IBSAT
- Quantitative Aptitude
- Percentage
- Want to practice more? Try solving extra ecology questions todayView All Questions
Questions Asked in SNAP exam
In the following figure, the smaller triangle represents teachers; the big triangle represents politicians; circle represents graduates and rectangle represents members of Parliament. Different regions are being represented by letters of English alphabet. On the basis of the above diagram, answer the following questions: 
- SNAP - 2024
- Venn Diagrams