Computer chips often contain surface imperfections. For a certain type of computer chip, the probability mass function of the number of defects X is presented in the following table.

a. Find P(X ≤ 2).

s

b. Find P(X > 1).

c. Find μX.

d. Find

Answer

Step 1 of 5</p>

The given probability mass function of the number of defects X is represented in the following table

X |
0 |
1 |
2 |
3 |
4 |

P(X) |
0.4 |
0.3 |
0.15 |
0.1 |
0.05 |

Write the necessary probabilities from the table for the following

Step 2 of 5</p>

a) P(X2)=P(0)+P(1)+P(2)

=0.4+0.3+0.15

=0.85

Step 3 of 5</p>

b) P(X>1) =P(2)+P(3)+P(4)

=0.15+0.1+0.05

=0.3