Question

If there are 20 tags available, what is the minimum number of tags a customer must choose to guarantee an even sum of values?

a) 10
b) 15
c) 20
d) It cannot be guaranteed

Answer 1

The minimum number of tags a customer must choose to guarantee an even sum of values is 10.

Step-by-step explanation:

To guarantee an even sum of values, the customer must choose either an even number of tags or an odd number of tags with at least one tag having an even value. Since there are 20 tags available, the minimum number of tags the customer must choose is 10.