By coulter, TLC= 22.5x109/L If NRBC are 200 per 100 leucocytes, so corrected leucocytic count equals

By coulter, TLC= 22.5x109/L If NRBC are 200 per 100 leucocytes, so corrected leucocytic count equals:
a. 11.5 x 109/L
b. 22.3 x 109/L
c. 22.7 x 109/L
d. 7.5 x 109/L

(d) using the correction formula :
Corrected WBC= WBC X 100 / (NRBC+100)
Corrected WBC= 22.5 X 100 / (200 + 100 )
= 7.5 x 109/L