The following table shows total number of students in the Department of the Institute along with percentage of Females and Male students. Answer the question based on the data given below:
Q1. What is the respective ratio of the number of females in Mechanical Department to the number of females in Electronics Department?
(1) 4 : 3
(2) 23 : 22
(3) 24:21
(4) 23 : 21
Sol.
The number of females in Mechanical department = 900 * 23/100 = 207
The number of females in Electronics department = 450 * 44/100 = 198
207/198 = 23/22
Q2. What is the total number of students in all the Departments?
(1) 2210
(2) 3210
(3) 3400
(4) 3310
Sol.
Total number of Students in all department = 840+220+900+360+450+540 = 3310
Q3. What is the total number of male students in Computer and Mining Department together?
(1) 266
(2) 886
(3) 786
(4) 686
Sol.
Number of male students in Computer department = 840* 55/100 =462
Number of male student in Mining Department = 540* 60/100 = 324
Total number of male students in both department = 462 + 324 = 786
Q4. What is the ratio of the number of females in Civil and Electrical departments together to the number of males in the same Departments together?
(1) 311 : 270
(2) 329 : 261
(3) 411 : 469
(4) 311 : 269
Sol.
Number of females in Civil department = 220*35/100 = 77
Number of females in Electrical department= 360*65/100= 234
Total females in both department = 77+ 234= 311
Number of males in Civil department = 220*65/100= 143
Number of males in Electrical department = 360*35/100=126
Total number of males in both department = 143+126 = 269
311 / 269.
Q5. What is the average percentage of female students in the whole Institute ?
(1) 42.0%
(2) 41.0%
(3) 43.0%
(4) 41.5%
Sol.
Total percentage of female =45+35+23+65+44+40 =252
Average percentage in institute =252/6=42%