Let X be the number of minutes that it takes a random selected student to solve a mathematical problem. The probability density function of X is: 1) Find the probability that a student takes less than 1.5 minutes to solve the mathematical problem.

Let X be the number of minutes that it takes a random selected student to solve a mathematical problem. The probability density function of X is: 1) Find the probability that a student takes less than 1.5 minutes to solve the mathematical problem.

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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Question

Let X be the number of minutes that it takes a random selected student to solve a mathematical problem. The probability density function of X is:

1) Find the probability that a student takes less than 1.5 minutes to solve the
mathematical problem.

If we change question Q1(a) to P (0 < X < 1.5), will we get the same
answer? Give your justification.

f(r) =
(6+x – a?), 0 < x < 3
27
0,
otherwise

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