Step 1:

Total number of questions to be answered is 4.

Number of choices to be made for correct answer is 3.

Let be the probability of selecting correct answers.

Probability of selecting correct answer from each question is

.

Step 2:

Let be the probability of selecting correct answers.

Probability of answering 4 questions is

Solution:

The probability of correctly answering four questions is .

 Step 1:

Probability is a measure of how likely an events is to occur.

(a)

Probability of an certain event which occurs all the time is 1.

(b)

Probability of  event will happen more often than not is 0.25

(c)

Probability of an impossible event is 0.

(d)

Probability of  event is likely and will occur occasionally is 0.60

Match:

(a)

Solution