A Company Is Studying the Number of Daily Debit Card

question 7

Multiple Choice

A company is studying the number of daily debit card purchases. There were 20 purchases and the
Probability of a debit card purchase is 0.5. Of the 20 purchases, what is the expected value of the
Number of debit card purchases?

• A) 4
• B) 6
• C) 8
• D) 10
• E) 12

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Definitions:

Metacognitive Skills

Abilities that enable an individual to understand, control, and manipulate their own cognitive processes, such as learning, memory, and problem-solving.

Schooling

The process of education and learning in a formal institutional setting, typically involving a curriculum of study.

Concrete Operations

A stage in Piaget's theory of cognitive development, typically occurring between ages 7 and 11, when children gain the ability to think logically about concrete events.

Mastery Orientation

A way that children approach school tasks in which they are motivated to learn, to try hard, and to improve their performance.