If A and B are square matrices of order 2 such that det(AB) = det(BA), then which one of the following is correct?
A must be a unit matrix.
B must be a unit matrix.
Both A and B must be unit matrices.
A and B need not be unit matrices.
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
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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