In a company of 400 employees,250 use a computer and 100 use a telephone as part of their work. The probability that an employee chosen at random neither uses a computer nor a telephone is 0.2. What...

In a company of 400 employees,250 use a computer and 100 use a telephone as part of their work. The probability that an employee chosen at random neither uses a computer nor a telephone is 0.2.

What is the probability that a randomly selected employee uses a telephone and does not use a computer?