Answer
See below
Work Step by Step
The probability that none of the chips are defective is: $P_1=(1-0.01)^8=(0.99)^8=0.9227$
The probability that one of the chips is defective is: $P_2=_8 C_7(1-0.01)^7\times0.01=(0.99)^8=0.0746$
The probability that at least two of the chips are defective is: $1-P_1-P_2=1-0.9227-0.0746=0.0027$