Question
The ________ regulates and controls the amount of light
entering the eye.Solution
• The pupil is the central opening in the iris that controls the amount of light entering the eye by contracting or dilating. • Iris controls the size of the pupil, but the pupil itself regulates light entry.
- An amount is first boosted by 28% and then cut down by 40%. Find the overall percentage change from the original amount.

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- In a certain examination, Neha got 46% and was 10 marks short of passing. Kunal got 52% and scored 8 marks more than required. What are the passing marks?
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If the student scores 27% of the marks, then he has failed by 186 marks. But if he scores 54% marks then he is passed by 246 marks. Find the passing per...