Answer:
51
Step-by-step explanation:
An organism is said to be diploid if he/she possesses two complete sets of chromosomes and the number of such sets is the diploid number.
The haploid number refers to the number of chromosomes in one set, that is it is half the diploid number.
Since in the given question the diploid number is 102, the haploid number must be 1/2 X 102 = 51.