How many integers are included in the inclusive range from 17 to 55?

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Multiple Choice

How many integers are included in the inclusive range from 17 to 55?

Explanation:
Counting integers in a closed interval means including both endpoints. The amount equals last minus first, plus one. Here, last is 55 and first is 17, so 55 − 17 + 1 = 39. So there are 39 integers from 17 to 55 inclusive. If you forgot the +1, you’d get 38, which would miss the starting point.

Counting integers in a closed interval means including both endpoints. The amount equals last minus first, plus one. Here, last is 55 and first is 17, so 55 − 17 + 1 = 39. So there are 39 integers from 17 to 55 inclusive. If you forgot the +1, you’d get 38, which would miss the starting point.

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