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18 August, 06:22

For Exercises 51-60, use the following information:

U = x is a natural number less than 20

A = x

B = x

(Note: The prime numbers less than 20 are 2, 3, 5, 7, 11, 13, 17, and 19.) Find the cardinality of each set.

Answer

58.

n (B′)

+1
Answers (1)
  1. 18 August, 08:30
    0
    15

    Step-by-step explanation:

    We assume your "natural numbers" are positive integers. (Some authors also include zero.)

    n (B) = 5

    n (U) = 20

    n (B') = 20 - 5 = 15
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