Question

what is the probability that a randomly selected upper level statistics class has at least 10 students g

Answer 1

0.55

Explanation:

Given

See attachment for table

Required

`P(x \ge 10)`

To do this, we consider rows where x is either 10 or greater than 10

i.e. 10, 11 and 12

So:

`P(x \ge 10) = P(10) + P(11) + P(12)`

Using values from the table, we have:

`P(x \ge 10) = 0.20 + 0.25 + 0.10`

`P(x \ge 10) = 0.55`