Question

A classroom of 20 students can be categorized on the basis of blood-types: 5 students each with "a", "b", "ab", and "o" blood-types. If four students are selected at random from this class, what is the probability that each student has a different blood-type? (a) 0.2500 (b) 0.1289 (c) 0.0625 (d) 0.0156

Answer 1

Answer:

I hope ,

option a is correct . 0.2500