Let a Be the Set of All Strings of Decimal

question 147

Short Answer

let A be the set of all strings of decimal digits of length five. For example, 00312 and 19483
are strings in A.
-How many strings in A have exactly three 5s?

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Definitions:

Piagetian Theory

Piagetian Theory refers to the cognitive development theory proposed by Jean Piaget, which suggests that children move through four stages of mental development.

Mental Structures

Conceptual frameworks or patterns of thinking that individuals use to process and organize information.

Memory Capacity

The amount of information that can be held in the memory system at one time, varying across different types and stages of memory.

Sensorimotor Stage

A Piagetian stage of infancy marked by the absence of the capacity for mental representation.