Answer:
Will be less than the actual age
Explanation:
When using radioisotopes to determine the date of a sample of anything, it is important to understand some concepts. When a radioactive particle decays, it forms daughter atoms (the radioactive particle determines the daughter particles formed), and these atoms can be used to determine the age of the sample.
Hence, if daughter particles are missing, scientists can be lead to believe that the age of the sample is less than the actual age (since the daughter particles are not as many, it seems that it is not that old).
Consequently, if more daughter particles are found, the sample will determined to be very old.