Find the Mean of the Binomial Random Variable

question 76

Multiple Choice

Find the mean of the binomial random variable. Round to two decimal places when necessary.
-The probability is 0.3 that a person shopping at a certain store will spend less than $20. For groups of size 16, find the mean number who spend less than $20.

• A)14
• B)11.2
• C)6
• D)4.8

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Definitions:

Hardenability

The capacity of a steel to be hardened through heat treatment, influencing its toughness and wear resistance.

Molybdenum

A chemical element with the symbol Mo and atomic number 42, known for its high strength and resistance to heat, often used in steel alloys.

Toughness

The ability of a material to absorb energy and plastically deform without fracturing.

Toughener

A substance added to materials to increase their toughness, making them more resistant to impact and less likely to crack.