Question

DA chemistry lab requires students to

identify chemical compounds by using
various tests. Each student is given
samples of three different compounds,
labeled A, B, and C. Each student is also
given a list of seven possible compounds.
If a student does not perform the tests and
randomly chooses three from the list, what
is the probability that he guesses all three
correctly?

Answer 1

The chance of guessing the first one is 1/9. Second is 1/8. Third is 1/7.

Total is 1/9 x 1/8 x 1/7 = 1/504

Step-by-step explanation: