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The number of students appeared from a school for the Madhyamik Examination in three consecutive years are in the ratio 7 : 8 : 10 and 75%, 87.5% and 93.75% of the students of respective years were successful. What is the percentage of students who were successful during these three years taken together ?
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- 85.5%
- 86.5%
- 87%
- 88.5%
Correct Option: B
Number of successful students :
| First Year ⇒ | = | = 5.25x | ||
| 100 | 4 |
| Second year ⇒ | = 7x | 100 |
| Third year ⇒ | = 9.375x | 100 |
Total successful students
= 21.625x
Required percentage
| = | × 100 = 86.5% | 25x |
