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Let the total number of students be x Average marks obtained by the students = 40 Total marks = 40x After correcting the quantitative mistakes the average decreased by (40-25) = 15 marks Total reduction = 15 × 50 = 750 Now According to the Question, (40x-750)/x = 30 40x-750=30x x=75 Total number of students = 75
What is found in frequency modulation?
Bolometer is used to measure –
The polarization of electromagnetic waves demonstrates that they are:
For a non-relativistic particle, the ratio of phase velocity to group velocity of de Broglie waves is:
The density of water is maximum at which temperature?
Clear nights are colder than cloudy nights because of –