A sample of N-type semiconductor has electron density of 6.25 x 1018/cm3 at 300k. If the intrinsic concentration of carriers in this sample is 2.5 x 1013/cm3 at this temperature the hole density works out to be

A sample of N-type semiconductor has electron density of 6.25 x 1018/c

1.	A sample of N-type semiconductor has electron density of 6.25 x 1018/cm3 at 300k. If the intrinsic concentration of carriers in this sample is 2.5 x 1013/cm3 at this temperature the hole density works out to be
A.	106/cm3
B.	108/cm3
C.	1010/cm3
D.	10l2/cm3
Answer» C. 1010/cm3