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28 February, 09:32

A bag contains 11 blocks numbered from 1 to 11. Two blocks are selected from the bag at the same time.

Let event E = the two numbers are NOT even.

How many outcomes are in the complement of E?

A)

10

B)

20

C)

70

D)

90

+1
Answers (1)
  1. 28 February, 13:13
    0
    Event E is the two numbers are not even.

    The complement of event E is the two numbers are even.

    The number of outcomes of the complement of event E is 5 * 4 = 20, but since the outcome 2, 4 is the same as the outcome 4, 2, you need to divide the number of outcomes by 2.

    Answer: 10
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