5 people cleared a plot of land in 15 days. How many people would I need to hire to clear three times that plot in 5 days?

In an examination, questions were asked in five sections. Out of the total students, 5% candidates cleared the cut-off in all the sections and 5% cleared none. Of the rest, 25% cleared only one section and 20% cleared four sections. If 24.5% of the entire candidates cleared two sections and 300 candidates cleared three sections. Find out how many candidates appeared at the examination?
A.1000
B.1200
C.1500
D.2000

Passed in none = 5% 
Passed in all = 5%
Passed in four = 20% 0f 90% = 18%
Passed in three = 24.5%
Passed in three =(100-5-5-22.5-24.5-18) = 25%.
But given 300 students passed in three. 
Hence, 25% = 300. 
So, 100% = 1200. 
1200 students must have appeared.

Kingdom:
વનસ્પતિ
(unranked):
સપુષ્પ
(unranked):
Eudicots
(unranked):
Asterids
Order:
લેમિએલ્સ
Family:
લેમિએસી
Genus:
'ઓસિમમ (Ocimum)'
Species:

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SOLUTION :-
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Passed in none = 5% 
Passed in all = 5%
Passed in four = 20% 0f 90% = 18%
Passed in three = 24.5%
Passed in three =(100-5-5-22.5-24.5-18) = 25%.
But given 300 students passed in three. 
Hence, 25% = 300. 
So, 100% = 1200. 
1200 students must have appeared.

So , Option (B) 1200 is the right answer ✔️