The probability that a student selected in a class will pass mathematics test 3/5. how many students are likely to fail mathematics in the class with 65 students

Given that the probability of passing the mathematics test is 3/5, the probability of failing the test is 1 - 3/5 = 2/5.

So, out of 65 students:

Number of students likely to fail = 2/5 * 65 = 26

Therefore, 26 students are likely to fail mathematics in the class of 65 students.