4. In one of the biggest schools in Metro Manila, 80% of their high school students are known to have come from their elementary school. A random sample of 15 students will be taken for an interview regarding school policies. a. What is the probability that exactly 10 are from their elementary school? b. What is the probability that fewer than 3 of them are from their elementary school? c. Give the average number of students from their elementary school who were chosen in the random sample.

4. In one of the biggest schools in Metro Manila, 80% of their high school students are known to have come from their elementary school. A random sample of 15 students will be taken for an interview regarding school policies. a. What is the probability that exactly 10 are from their elementary school? b. What is the probability that fewer than 3 of them are from their elementary school? c. Give the average number of students from their elementary school who were chosen in the random sample.

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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