Problema Solution
A group of 92 students enter a lecture theater. They all have a mobile phone at the end end of 2 hours, 14 phones rung. what percentage is this of the group?
Answer provided by our tutors
Assuming that the 14 phone rings were made by different mobile phone we have:
(14/92)*100 = 15.22%
15.22% of the group's mobile phones rang.