Problem #PRU-65270

Problems Probability and statistics Probability theory Discrete distribution Number Theory Divisibility Divisibility of a number. General properties
 13–16  3.0

Problem

There are fewer than 30 people in a class. The probability that at random a selected girl is an excellent student is 3/13, and the probability that at random a chosen boy is an excellent pupil is 4/11. How many excellent students are there in the class?