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Table 2.1 shows the classification of 50 students according to their gender and their time spent on watching Netfree in a week during semester break. Table 2.1 Time spent on watching Netfree At least 25 hours (N) Less than 25 hours (L) Male (M) Female (F) 15 8 10 17 Calculate the probability that a randomly selected student is a female or spent less than 25 hours on watching Netfree. (i) (ii) Find the probability that a randomly selected male student spent at least 25 hours on watching Netfree. Two students are randomly selected from the 50 students without replacement. Find the probability that at least one ofthem spent less than 25 hours on watching Netfree. (iii)

Table 2.1 shows the classification of 50 students according to their gender and their time spent on watching Netfree in a week during semester break. Table 2.1 Time spent on watching Netfree At least 25 hours (N) Less than 25 hours (L) Male (M) Female (F) 15 8 10 17 Calculate the probability that a randomly selected student is a female or spent less than 25 hours on watching Netfree. (i) (ii) Find the probability that a randomly selected male student spent at least 25 hours on watching Netfree. Two students are randomly selected from the 50 students without replacement. Find the probability that at least one ofthem spent less than 25 hours on watching Netfree. (iii)

A First Course in Probability (10th Edition)
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...
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(b) Table 2.1 shows the classification of 50 students according to their gender and their time spent on watching Netfree in a week during semester break. Table 2.1 Time spent on watching Netfree At least 25 hours (N) Less than 25 hours (L) Male (M) Female (F) 15 8 10 17 Calculate the probability that a randomly selected student is a female or spent less than 25 hours on watching Netfree. (i) (ii) Find the probability that a randomly selected male student spent at least 25 hours on watching Netfree. Two students are randomly selected from the 50 students without replacement. Find the probability that at least one ofthem spent less than 25 hours on watching Netfree. (iii)
Transcribed Image Text:(b) Table 2.1 shows the classification of 50 students according to their gender and their time spent on watching Netfree in a week during semester break. Table 2.1 Time spent on watching Netfree At least 25 hours (N) Less than 25 hours (L) Male (M) Female (F) 15 8 10 17 Calculate the probability that a randomly selected student is a female or spent less than 25 hours on watching Netfree. (i) (ii) Find the probability that a randomly selected male student spent at least 25 hours on watching Netfree. Two students are randomly selected from the 50 students without replacement. Find the probability that at least one ofthem spent less than 25 hours on watching Netfree. (iii)
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