# An employee of the records office at a certain university

## Problem 92E Chapter 2

Probability and Statistics for Engineering and the Sciences | 9th Edition

• 2901 Step-by-step solutions solved by professors and subject experts
• Get 24/7 help from StudySoup virtual teaching assistants

Probability and Statistics for Engineering and the Sciences | 9th Edition

4 5 0 429 Reviews
22
3
Problem 92E

An employee of the records office at a certain university currently has ten forms on his desk awaiting processing. Six of these are withdrawal petitions and the other four are course substitution requests. a. ?If he randomly selects six of these forms to give to a subordinate, what is the probability that only one of the two types of forms remains on his desk? b. ?Suppose he has time to process only four of these forms before leaving for the day. If these four are randomly selected one by one, what is the probability that each succeeding form is of a different type from its predecessor?

Step-by-Step Solution:

Answer : Step 1 of 2 : Given, An employee of the records office at a certain university currently has ten forms on his desk awaiting processing. Six of these are withdrawal petitions and the other four are course substitution requests. a) If he randomly selects six of these forms to give to a subordinate, the claim is to find the probability that only one of the two types of forms remains on his desk W = withdrawal positions = 6 S = Course substitution request = 4 Either W of the forms are selected or all of the course substitution forms are selected and 2 of the W are selected. The total number of ways this can be done is 6C6 +6C2 n! C(n, r) = r!(n r)! C(6, 6) =1 6! C(6, 2) = 2!(6 2)! = 15 The total number of ways this can be done is 15 The total number of ways 6 can be chosen is 10C6 10! C(10, 6) = 6!(10 6)! = 210 The required probability is 16/210 = 0.07619.

Step 2 of 2

##### ISBN: 9780321629111

Since the solution to 92E from 2 chapter was answered, more than 890 students have viewed the full step-by-step answer. This full solution covers the following key subjects: forms, these, Randomly, Probability, Desk. This expansive textbook survival guide covers 18 chapters, and 1582 solutions. The full step-by-step solution to problem: 92E from chapter: 2 was answered by , our top Statistics solution expert on 05/06/17, 06:21PM. The answer to “An employee of the records office at a certain university currently has ten forms on his desk awaiting processing. Six of these are withdrawal petitions and the other four are course substitution requests. a. ?If he randomly selects six of these forms to give to a subordinate, what is the probability that only one of the two types of forms remains on his desk? b. ?Suppose he has time to process only four of these forms before leaving for the day. If these four are randomly selected one by one, what is the probability that each succeeding form is of a different type from its predecessor?” is broken down into a number of easy to follow steps, and 106 words. This textbook survival guide was created for the textbook: Probability and Statistics for Engineering and the Sciences, edition: 9. Probability and Statistics for Engineering and the Sciences was written by and is associated to the ISBN: 9780321629111.

#### Related chapters

×
Get Full Access to Probability And Statistics For Engineering And The Sciences - 9 Edition - Chapter 2 - Problem 92e

Get Full Access to Probability And Statistics For Engineering And The Sciences - 9 Edition - Chapter 2 - Problem 92e

I don't want to reset my password

Need help? Contact support

Need an Account? Is not associated with an account
We're here to help