Question
While tabulation of marks scored in an examination by
the students of a class, by mistake the marks scored by one student got recorded as 93 in place of 63, and thereby the average marks increased by 0.5. What was the number of students in the class?Solution
The correct answer is D
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.