Out of 150 students, 30% actually failed the test. How many additional students failed, if teacher expected only 20% to fail while preparing the question paper?
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Answer:
15 additional students failed.
Step-by-step explanation:
30% of 150 students = 30/100 × 150
= 3 × 15
= 45.
20% of 150 students
= 20/100 × 150
= 2 × 15
= 30
Additional students = 45 - 30 = 15.
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