The following table shows the number of students who appeared in a Common Entrance Test (CET) from six different schools A-F during the years 2020-2022, and the ratio of number of passed (P) to the number of failed (F) students among them. Based on the data in the table, answer the questions: School-wise Appearance of Students in CET during 2020-2022. School 2020 2021 2022 Appeared P ∶ F Appeared P ∶ F Appeared P ∶ F A 1292 11 ∶ 8 1508 7 ∶ 6 1344 3 ∶ 5 B 1694 4 ∶ 7 1690 8 ∶ 5 1904 9 ∶ 8 C 1620 8 ∶ 7 1584 7 ∶ 4 1274 4 ∶ 3 D 1752 7 ∶ 5 1656 11 ∶ 7 1976 7 ∶ 12 E 1740 3 ∶ 2 1452 7 ∶ 4 1430 8 ∶ 5 F 1972 17 ∶ 12 1734 12 ∶ 5 1848 8 ∶ 13
What is the average number of students who failed in the test from School C in all the three years together?
626
Given:
Number of students appearing from school C in 2020 = 1620
Pass and fail ratio in 2020 = 8 ∶ 7
Number of students appearing from school C in 2021 = 1584
Pass and fail ratio in 2021 = 7 ∶ 4
Number of students appearing from school C in 2022 = 1274
Pass and fail ratio in 2022 = 4 ∶ 3
Concept Used:
Average = Sum of observations ÷ Number of observations
Calculation:
Number of students failing in 2020 = [7 ÷ (8 + 7)] × 1620 = 756
Number of students failing in 2021 = [4 ÷ (7 + 4)] × 1584 = 576
Number of students failing in 2022 = [3 ÷ (4 + 3)] × 1274 = 546
Total number of failing students = 756 + 576 + 546 = 1878
Average number of failing students = 1878 ÷ 3 = 626
∴ The total number of failing students from school C over the three years is 626.
Important Questions from Tabulation
The table shows District-wise data of a number of primary school teachers posted in schools of a city.
Study the table and answer the question:
District
Male teachers
Female teachers
East
1650
2375
North
1075
2651
West
1280
1520
South
1170
1085
Central
690
859
What is the difference between the total number of male teachers in the districts East, North, West taken together and the total number of female teachers in the districts East and South?Table shows income (in Rs. ) received by 4 employees of a company during the month of December 2020 and all their income sources.
Source
Amit
Suresh
Nitin
Varun
Salary
35000
38500
29000
42000
Arrears
6000
6300
5000
7500
Bonus
1000
1100
1000
1240
Overtime
1800
1950
1400
1500
What is the ratio of salary of Varun to his income other than salary?Study the table and answer the question:
Income (Rs.)
No. of persons
Less than 200
12
Less than 250
26
Less than 300
34
Less than 350
40
Less than 400
50
What is the percentage of persons earning Rs. 250 or more?The following table shows the annual profit of a company (in Rs. lakh).
2014-2015
2015-2016
2016-0217
2017-2018
2018-2019
625
690
725
775
815
The period which has the maximum percentage increase in profit over the previous year is:
The table given below shows the number of persons participating in a survey from 6 different states.
States Persons S1 100 S2 200 S3 400 S4 500 S5 600 S6 800 What is the ratio of number of person participating in a survey from state S3 to the number of person participating in a survey from state S4?
