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Number System LCM & HCF Percentage Ratio & Proportion Average Simple Interest

Business Mathematics

Profit & Loss Compound Interest Partnership Discount Stocks & Shares Banking

Time, Work & Motion

Time & Work Pipes & Cisterns Time, Speed & Distance Trains Boats & Streams Races

Advanced Mathematics

Algebra Geometry Mensuration Trigonometry Logarithms & Indices Coordinate Geometry

Statistics & Probability

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Average Aptitude Questions & Formulas with answer


Ques 1 GATE 2025 SET-1

The average marks obtained by a class in an examination were calculated as 30.8. However, while checking the marks entered, the teacher found that the marks of one student were entered incorrectly as 24 instead of 42. After correcting the marks, the average becomes 31.4. How many students does the class have?

A

25

B

28

C

30

D

32

(c) is the correct answer.


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