If the matrix AB is a zero matrix, then which one of the following is correct ?
A must be equal to zero matrix or B must be equal to zero matrix
A must be equal to zero matrix and B must be equal to zero matrix
It is not necessary that either A is zero matrix or B is zero matrix
None of the above
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy