Question

Help with probability

Answer 1

The number of courses X taken in one term by students at a large university has the probability distribution shown below ,where k is some constant:

X. 1 2 3 4 5 6
P(X=x) 0.05 k 0.21 3k 0.32 2k

What is the probability that a randomly selected student is taking at least 3 courses in one term?

Answer 2

Can you guys help?

Answer 3

what do u think?

Answer 4

I got k is 0.07

Answer 5

Okk, at least 3 courses means 3 or 4 or 5 or 6 courses

Answer 6

I got it thanks so much