anjanchili anjanchili

12-01-2020
Mathematics

contestada

How many subsets of the set {1, 2, 3, ..., 12} contain exactly one or two prime numbers?

Respuesta :

PollyP52 PollyP52

12-01-2020

Answer:

15.

Step-by-step explanation:

The prime numbers in the set are 2, 3, 5, 7 and 11.

So the answer is 5 + number of combinations of 2 from 5

= 5 + 5C2

= 5 + 10

= 15.

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