if an endosperm of angiosperm contains 24 chromosomes.. number of chromosomes in each cell of roots is??​

Endosperm of angiosperms is triploid (3n) While as root cell is diploid(2n). 

Given 3n = 24

Therefore, n = 24/3= 8 

Hence, number of chromosomes in each root cell = 2n = 2 x 8 = 16.