Student randomly receive 1 of 4 versions(a, b, c, d) of a math test. what is the probability that at least 3 of the 5 student tested will get version a of the test? express your answer as a percent, and round to the nearest tenth

1.2%

Step-by-step explanation:

We are given that the students receive different versions of the math namely A, B, C and D.

So, the probability that a student receives version A = .

Thus, the probability that the student does not receive version A = = .

So, the possibilities that at-least 3 out of 5 students receive version A are,

1) 3 receives version A and 2 does not receive version A

2) 4 receives version A and 1 does not receive version A

3) All 5 students receive version A

Then the probability that at-least 3 out of 5 students receive version A is given by,

++

=

=

=

=

= 0.01171875 × 1.0625

= 0.01245

Thus, the probability that at least 3 out of 5 students receive version A is 0.0124

So, in percent the probability is 0.0124 × 100 = 1.24%

To the nearest tenth, the required probability is 1.2%.

if x = 1, then the answer is 3.5