Achimp is taking a multiple choice test. of course the chimp can’t read and is guessing for every question. if there are 4 choices for each question, and there are 84 questions on the test, how many questions can we expect the chimp to answer correctly? (hint: there is a 25% chance that the chimp will guess correctly .)

We can expect the chimp to answer 21 questions correctly.

Step-by-step explanation:

There are 4 choices for each question, and there are 84 questions on the test.

There is a 25% chance that the chimp will guess correctly.

This question is a binomial Problem where n = 84 and p = 0.25

We have to find the mean here.

Mean = np = = 21

Hence, we can expect the chimp to answer 21 questions correctly.

the range is 19

step-by-step explanation:

the range is biggest number minus the smallest, so in this case it would be

41 - 22 = 19

rx and sx

step-by-step explanation: