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Facebook uses sponsored ads of which 25% are targeted ads and the rest are not. Some ad-blockers attempt to block such targeted ads before they are delivered to the user. One such ad-blocker has a 51% chance of blocking an ad if it is actually targeted, and a 50% chance of blocking an ad that is not targeted. a. What is the probability that a randomly selected ad was blocked? Answer in exact fraction, or rounded to at least 4 decimal places b. If an ad is blocked by the ad-blocker, what is the probability that it was not targeted? Answer in exact fraction, or rounded to at least 4 decimal places c. If a user is served an ad which was not blocked, what is the probability that it was targeted? Answer in exact fraction, or rounded to at least decimal places

Facebook uses sponsored ads of which 25% are targeted ads and the rest are not. Some ad-blockers attempt to block such targeted ads before they are delivered to the user. One such ad-blocker has a 51% chance of blocking an ad if it is actually targeted, and a 50% chance of blocking an ad that is not targeted. a. What is the probability that a randomly selected ad was blocked? Answer in exact fraction, or rounded to at least 4 decimal places b. If an ad is blocked by the ad-blocker, what is the probability that it was not targeted? Answer in exact fraction, or rounded to at least 4 decimal places c. If a user is served an ad which was not blocked, what is the probability that it was targeted? Answer in exact fraction, or rounded to at least decimal places

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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Facebook uses sponsored ads of which 25% are targeted ads and the rest are not. Some ad-blockers attempt to block such targeted ads before they are delivered to the user. One such ad-blocker has a 51% chance of blocking an ad if it is actually targeted, and a 50% chance of blocking an ad that is not targeted. a. What is the probability that a randomly selected ad was blocked? Answer in exact fraction, or rounded to at least 4 decimal places b. If an ad is blocked by the ad-blocker, what is the probability that it was not targeted? Answer in exact fraction, or rounded to at least 4 decimal places c. If a user is served an ad which was not blocked, what is the probability that it was targeted? Answer in exact fraction, or rounded to at least 4 decimal places
Transcribed Image Text:Facebook uses sponsored ads of which 25% are targeted ads and the rest are not. Some ad-blockers attempt to block such targeted ads before they are delivered to the user. One such ad-blocker has a 51% chance of blocking an ad if it is actually targeted, and a 50% chance of blocking an ad that is not targeted. a. What is the probability that a randomly selected ad was blocked? Answer in exact fraction, or rounded to at least 4 decimal places b. If an ad is blocked by the ad-blocker, what is the probability that it was not targeted? Answer in exact fraction, or rounded to at least 4 decimal places c. If a user is served an ad which was not blocked, what is the probability that it was targeted? Answer in exact fraction, or rounded to at least 4 decimal places
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