Least common multiple of 15,10,and 3

Suppose you want just guess at the answers in a 5 question multiple-choice test. each question has 3 responses and only one is correct. what is the probability of getting two questions right just guessing? 20 points 0.3275 0.2753 0.7532 none of the above

What situation is an example of an observational study

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?