Question
In 2018, an online course had 'r' subscribers.
Subscribers increased by 50% in 2019 and another 25% in 2020. However, in 2021 subscribers decreased by 40%. If the percentage of active users was 50% in 2018 and 60% in 2021, what is the percentage change in the number of active users?Solution
ATQ, Let the number of subscribers in 2018 be 4000. In 2019, subscribers = 1.50×4000=6000. In 2020, subscribers = 1.25×6000=7500. In 2021, subscribers decreased by 40% = 0.60×7500=4500. Active users in 2018 = 0.50×4000=2000. Active users in 2021 = 0.60×4500=2700. Percentage change in active users = {(2700−2000)/2000}×100% = 35%. Therefore, the number of active users increased by 35% from 2018 to 2021.
In a college the ratio of boys and girls are in the ratio 7:9. 65% girls and 40% boys were absent. Find the girls present if the total number of student...
In a box, there are some coins and rings which are either silver or gold. If 40% of the objects are rings and 50% of the coins are silver, then find out...
The ratio between the length and breadth of a rectangular board is 7:5. If the breadth of the board is 20.5cm, find the length in cm.
Ina regiment the ratio between the number of officers to soldiers was 3 : 31 before battle. In a battle 6 officers and 22 soldiers were killed and the r...
- A bag contains red and yellow marbles in the ratio 4:5, respectively. Also, the ratio of yellow to green marbles is 1:3. If the total number of marbles in ...
A invested a certain amount in Debt and Equity mutual funds in the ratio of 5: 6 respectively. At the end of one year, he earned a total dividend of 40%...
The total number of cars to the total number of bikes in Showrooms P and Q is in the ratio 60:17. Additionally, the number of bikes in Showroom P to th...If the base radius of 2 cylinders are in the ratio 3 : 4 and their heights are in the ratio 4 : 9, then the ratio of their volumes is:
In what ratio should coffee powder costing Rs 2500/kg be mixed with coffee powder costing Rs 1500/kg so that the cost of the mixture is Rs 2250/kg?
Two friends, A and B, divided 96 pencils between them in the ratio of 2:6 respectively. Later, A bought 12 more pencils and B purchased 6 more. What is ...
