A classroom has 49 students; 23 of them read Al-Akhbar newspaper, 21 read Al-Ahram newspaper and 5 read both. If a student is selected at random, calculate the probability that the student reads Al-Ahram newspaper.
The probability of event occurring is equal to the number of
favorable outcomes divided by the total number of possible
outcomes in the sample space, . In this case, event is
selecting a student who reads Al-Ahram newspaper. Find the
probability of event as follows, keeping in mind that the
students who read Al-Ahram newspaper include the students who read
Thus, the probability of selecting a student who reads Al-Ahram
newspaper is .