Ivan and Polina have each drawn a conclusion about multiplying negative fractions.

Ivan: The product of an even number of negative fractions is always positive.
Polina: The product of an odd number of negative fractions is always negative.

Whose conclusion is correct?
Ivan only
Polina only
both Ivan and Polina
neither Ivan or Polina

Both Ivan and Polina have incorrect conclusions. The product of an even number of negative fractions is also negative, not positive, and the product of an odd number of negative fractions is positive, not negative. Therefore, neither Ivan nor Polina is correct.