Unit 11 Probability Distribution Test Math 4

Front

Is this a probability distribution?

Back

No, the sum of p(x) does not equal 1.

Front

A discrete random variable X has the probability distributions shown in the table. Find the value of k.

Back

1/12

Front

A discrete random variable has a probability distribution shown in the table. Find the value of a.

Back

0.25

Front

Given the probability model in the table below, what is the expected value of the random variable?
  X        50          20        5
P(X)     0.1         0.3      0.6

Back

14

Front

What is the expected value of a coin flip where Eva wins $4 for heads and loses $3 for tails?

Back

$0.50

Front

Is rolling a fair die for $1.00 with a payout of $3.00 for rolling a 4 or a 2 a fair game?

Back

yes

Front

What is the expected number of cars for a randomly chosen American household?

Back

1.75

Front

Suppose you buy a ticket for $6 out of a lottery of 1000 tickets where the prize for the one winning is to be $800. How much money do you take home (after paying for it)?

Back

-$5.20

Front

Expand
(b - 2)³

Back

b³ - 6b² + 12b - 8

Front

Find the 2nd term in the expansion of (2b + 1)³

Back

12b²