mutually exclusive events
For example, when a die is thrown, the probability of obtaining a ‘one' is 
, and the probability of obtaining a ‘two' is 
. These events are mutually exclusive. So the probability of obtaining a ‘one' or a ‘two' is equal to 
.
- topological vector space
- topology
- toppling
- torque
- torsion
- torsion element
- torus
- torus
- total differential
- total expectation law
- total force
- totally bounded
- totally disconnected
- total order
- total probability law
- total relation
- totient function
- touch
- tower law
- Tower of Brahma
- Tower of Hanoi
- trace
- tractrix
- trail
- trajectory