# Interval Notation Calculator

The Interval Notation Calculator an online tool which shows Interval Notation for the given input. Byju's Interval Notation Calculator is a tool
which makes calculations very simple and interesting. If an input is given then it can easily show the result for the given number.

#### Practise This Question

There are four machines and it is known that exactly two of them are faulty. They are tested, one by one, is a random order till both the faulty machines are identified. Then the probability that only two tests are needed