Question
A payment of ₹120 is made with ₹10, ₹5 and ₹2
coins. A total of 25 coins are used. Which of the following is the number of ₹10 coins used in the payment?Solution
Total coins used = 25. let the number of ₹10 coins = x Number of ₹5 coins = y Number of ₹2 coins = z Total number of coins = x + y + z = 25 ........(1) Total money = 10x + 5y + 2z = 120 ..........(2) from equation (1), we get z = 25 - x - y put this value in equation (2), we get 8x + 3y = 70 so, if x = 8, then y = 2 then, z = 25 - 8 - 2 = 15 required answer = 8
If 60% of total employees in department B in 2016 are male and 40% of total employees in department A in 2018 are female, then find the ratio of total n...
What is the maximum value of a given item per kg out of the given years of the given table: -
What is the difference between the sum of the number of red pens and the number of black pens sold by shopkeeper D and the number of black pens sold by ...
Find the average number of umbrellas sold in city A, C, E and F.
Total number of pencils sold on Tuesday is approximately how much percent more/less than the number of pencils sold on Wednesday and Friday together.
The pie chart given below shows the number of students in seven different institutes in a town. Total number of students in all the seven institutes is ...
What is the ratio of the number of Refrigerators in the Store C to the number of Refrigerators in the Store D?
In wing D people who have taken subscription of OTT Platform P are 25% more than that of wing F people. Number of people having other OTT platform is sa...
If in school B, number of female students is 25% of the total number of students and ratio of male and female teachers is 5:7, and then find the differe...
The Speed of two cyclists follow a ratio of 9:5. If the slower cyclist covers a distance of 480 km in 6.4 hours, determine the time it takes for the fas...
Relevant for Exams:
