# a2s - MATH 1131 3.0 - Fall 2010 Solution for Assignment 2...

This preview shows pages 1–2. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: MATH 1131 3.0 - Fall 2010 Solution for Assignment 2 Question 1: Student’s Absent Medium Absent Grade Infrequently Absenteeism Frequently Total Low 1 9 8 18 Medium 6 35 7 48 High 8 9 2 19 Total 15 53 17 85 a. Probability that a randomly selected student will have a low grade is 18 85 = 0 . 2118. b. Probability that a randomly selected student absent frequently is 17 85 = 0 . 2. c. Grades and frequency in absent are not independent events because P ( Low grade and Infrequently absent ) 6 = P ( Low grade) P ( Infrequently absent). d. Knowing that a randomly selected student has high grade, the probability that that student is absent frequently is 2 19 = 0 . 1053. e. Probability that a randomly selected student has either high grade or absent frequently is 34 85 = 0 . 4. Question 2: a. Let X be the number of mutated microbes (out of 10 being studied). P ( X = 4) = 10! 4!6! 1 6 4 5 6 6 = 0 . 0543....
View Full Document

## This note was uploaded on 12/22/2010 for the course MATHEMATIC Math 1131 taught by Professor Augustinewong during the Spring '10 term at York University.

### Page1 / 2

a2s - MATH 1131 3.0 - Fall 2010 Solution for Assignment 2...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online