Question
In an examination, the average marks obtained by the
students is 80. After correcting the quantitative mistakes, the average of 90 students is reduced to 50 from 80 and the overall average of the student is reduced to 62. Then find the total number of students who participated in that examination.Solution

Cinnabar is an ore of which metal?
Which gas is the chief component of Bio-gas?
Which of the following is used in alcoholic drinks?
Whose experiments supports Abiotic synthesis?
Which of the following pollutants is the major contributor to photochemical smog?
Which of the following fatty acids does NOT form soap?
Which of the following is the richest source of phosphorus?
"Schist" is the example of which type of rock?
Which element is known as the 'King of Chemicals.
_____________ has the maximum attraction force between the molecules.