What is lcm? find the lcm of 20 and 30.

The LCM for 20 is: 4

The LCM for 30 is: 3

C 10% Condition.

Step-by-step explanation:

Let's Look at them one by one.

A: Large Enough sample condition.

this is met because 600 students is a good number to carry out a surwey.

B: Randomization,  600 incoming freshman are definitely random.

C: we are left with C so the answer is C.