Giving a test to a group of students, results are summarized in the table. A B C Total Senior 19 5 18 42 Junior 8 17 7 32 Total 27 22 25 74 If one student was chosen at random, find the probability that the student got an A or a B on the test. Write your answer as a reduced fraction or whole number. P(A or B) = ?

Giving a test to a group of students, results are summarized in the table. A B C Total Senior 19 5 18 42 Junior 8 17 7 32 Total 27 22 25 74 If one student was chosen at random, find the probability that the student got an A or a B on the test. Write your answer as a reduced fraction or whole number. P(A or B) = ?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

John runs a computer software store. He counted 124 people who walked by his store in a day, 52 of whom came into the store. Of the 52, only 21 bought something in the store. Estimate the probability that a person who walks by the store will enter the store. Round your answer to the nearest hundredth. Group of answer choices 0.59 0.25 0.42 0.17 none of these choices
You randomly select one card from a 52-card deck. Find the probability of selecting: an ace or а 9? 13 2 13 10 5 13
What is the probability that a student selected randomly is a Democrat or a Republican? Do not write the "%" in your answer. Round the answer to the nearest percentage. Totals Republican Independent Democrat 98 68 15 15 Preferred Obama 142 12 25 Preferred McCain 105 240 80 40 Totals 120
A group of people were asked if statistics teachers know the true meaning of life. 255 responded "yes", and 497 responded "no". Find the probability that if a person is chosen at random, he believes statistics teachers know the true meaning of life. Probability (Please enter a reduced fraction.) %D
find the probability of randomly selecting a student who spent the money, given that the student was given a $1 bill. purchased gum kept the money students given 4 quarters 25 11 students given $1 bill 15 34
A bag contains 4 green jelly beans, 8 blue jelly beans, and 4 red jelly beans? What is the chance a student would pull a red jelly bean? A. 25% B. 50% C. 75% D. 100%
One card is randomly selected from a deck of cards. Find the odds against drawing a red three. The odds against drawing a red three are 1. (Simplify your answers.) C
Find the probability of selecting a 10 from a standard deck of cards. a 4 13 1. 52 1