Question
A certain number of students from school X appeared in
an examination and 30% students failed. 150% more students than those from school X. appeared in the same examination from school Y. If 80% of the total number of students who appeared from X and Y passed, then what is the percentage of students who failed from Y?Solution
Let number of students in school X be 100x Number of failed students in school X = 30% of 100x = 30x Number of passes students in school Y = (100x – 30x) = 70x Number of students in school Y = 100x + 150% of 100x = 100x + 150x = 250x Total number of students in school X and school Y = 100x + 250x = 350x Number of passes students in both schools = 80% of 350x = 280x So, number of passed students in school Y = 280x – 70x = 210x Number of failed students in school Y = 250x – 210x = 40x Percentage of failed students in school Y = (40x/250x) × 100% = 16% ∴ The percentage of students who failed from school Y is 16%
A sum of Rs. 2400 was divided among three persons X, Y and Z such that if their shares were diminished by Rs, 5, Rs. 10 and Rs. 15 respectively, the rem...
In what proportion must a grocer mix sugar at Rs.12 a kg and Rs.7 a kg so as to make a mixture worth Rs.8 a kg ?
The simplest form of the ratio of 2.5 : 6.5 is _____.
- A box has ₹2, ₹1 and 25 paise coins in the ratio 3:5:7. If the total value is ₹446.25, how many 25-paise coins are there?
- Determine the fourth proportion for 20, 25, and 40.
The average mark obtained by 150 candidates in a certain examination is 45. If the average marks of passed candidates are 55 and that of the failed cand...
Two numbers ‘A’ and ‘B’ are in the ratio 3:4 respectively. If ‘A’ is increased by 33(1/3)% and ‘B’ is increased by 25%, what will be the...
- Out of 750 students, the ratio of boys to girls is 6:4. The ratio of boys who passed to those who failed is 8:1, and that of girls is 7:3. How many student...
- Let’s assume, ‘p’ is directly proportional to ‘q’. Given that when p = 88, q = 44, calculate the value of ‘p’ when ‘q’ becomes 66.
In a tournament, the total runs scored by five batsmen is 600. The runs scored by Rahul and Pant are in the ratio of 9:8. If 1/3r...
