a) 1000
b) 1200
c) 1500
d) 2000
Answer: b
Explanain : Passed in none = 5%
Passed in all = 5%
Passed in four = 20% of 90% = 18%
Passed in one = 25% of 90% = 22.5%
Passed in two = 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
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