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Chapter 4: Q.25 (page 284)

Find the probability that a physics major will do post-graduate research for four years.

P(x=4)=_______

Short Answer

Expert verified

The probability that a Physics major will do post-graduate study for 4years is 0.15 that is P(X=4)=0.15

Step by step solution

01

Given Information

A physics professor is concerned about the percentage of physics majors who will spend the following few years pursuing post-graduate study. He is in possession of the following probability distribution:

02

Step 2: Explanation

Because the sum of all the possibilities of all the value obtained by a variables is 1, the sum of the P(x)columns equals one.

0.35+0.20+0.15+P(4)+0.10+0.05=1

that means

P(4)+0.85=1So,P(4)=1-0.85=0.15

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