For example, a tossed coin shows a
‘head’ or ‘tail’, a manufactured item can be ‘defective’ or ‘non-defective’, the response
to a question might be ‘yes’ or ‘no’, an egg has ‘hatched’ or ‘not hatched’, the decision
is ‘yes’ or ‘no’ etc In such cases, it is customary to call one of the outcomes a ‘success’
and the other ‘not success’ or ‘failure’ For example, in tossing a coin, if the occurrence
of the head is considered a success, then occurrence of tail is a failure Each time we toss a coin or roll a die or perform any other experiment, we call it a
trial