Question : Study the following table and answer the question below.
| School name | Total no of students enrolled | Percentage of enrolled students who opted for biology | The ratio of male to female students who opted for Biology |
| A | 900 | 30% | 7 : 8 |
| B | 400 | 38% | 9 : 10 |
| C | 1000 | 24% | 5 : 15 |
| D | 800 | 18% | 5 : 7 |
What is the ratio of the total number of male students to that of female students who opted for Biology in schools A and D together?
Option 1: 38 : 31
Option 2: 21 : 38
Option 3: 31 : 28
Option 4: 31 : 38
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Correct Answer: 31 : 38
Solution :
Total number of male students in school A who opted for Biology,
= $900×\frac{30}{100}×\frac{7}{15}$ = 126
Total number of female students in school A who opted for Biology,
= $900×\frac{30}{100}×\frac{8}{15}$ = 144
Total number of male students in school D who opted for Biology,
= $800×\frac{18}{100}×\frac{5}{12}$ = 60
Total number of female students in school D who opted for Biology,
= $800×\frac{18}{100}×\frac{7}{12}$ = 84
$\therefore$ The required ratio
= (126 + 60) : (144 + 84)
= 186 : 228
= 31 : 38
Hence, the correct answer is 31 : 38.
Related Questions
Question : Direction: Find the missing term in the following question:
| 8 | 6 | 7 |
| 9 | 13 | 11 |
| 3 | 7 | ? |
Option 1: 5
Option 2: 6
Option 3: 7
Option 4: 8
Question : Study the following table and answer the question that follows.
| School Name |
Total number of students enrolled |
Percentage of students who opted for statistics |
| A | 450 | 20 |
| B | 200 | 18 |
| C | 500 | 12 |
| D | 400 | 15 |
What is the average number of students who opted for other than statistics subjects in schools A and D?
Option 1: 7340
Option 2: 360
Option 3: 355
Option 4: 350
Question : Direction: Find the missing term in the following question:
| 3 | 4 | 9 |
| 2 | 5 | 2 |
| 6 | 7 | ? |
| 36 | 140 | 18 |
Option 1: 1
Option 2: 7
Option 3: 12
Option 4: 19
Question : Match the columns.
| Column-A (Class) | Column-B(common name) |
| i.Chlorophyceae | a.Brown algae |
| i.Phaeophyceae | b.Green algae |
| i.Rhodophyceae | c.Blue-green algae |
| v.Cyanophyceae | d.Red algae |
Option 1: i-b, ii-c, iii-a, iv-d
Option 2: i-b, ii-a, iii-d, iv-c
Option 3: i-d, ii-c, iii-b, iv-a
Option 4: i-a, ii-b, iii-c, iv-d
Question : Direction: Find the missing number from the given alternatives.
| 7 | 10 | 5 |
| 16 | 40 | 8 |
| 15 | ? | 9 |
Option 1: 75
Option 2: 45
Option 3: 20
Option 4: 30
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