In Questions Let a Be the Set of All Strings $$5 \mathrm {~s} ?$$

question 110

Short Answer

In questions let A be the set of all strings of decimal digits of length five. For example 00312 and 19483
are strings in
-How many strings in A have exactly three $$5 \mathrm {~s} ?$$

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Definitions:

Thoracic Vertebrae

The twelve vertebrae located in the middle section of the vertebral column, corresponding to the chest area.

Vertebra Prominens

The vertebra prominens refers to the most prominent vertebra, usually the C7 vertebra, marked by a longer and more palpable spinous process.

Axis

The second cervical vertebra (C2) of the spine, which allows the head to rotate.

Dens of the Axis

A prominent feature of the second cervical vertebra (axis), providing a pivot that allows the head and the atlas to rotate around the spinal axis.