medium · GMAT Quant
A manufacturer sources microchips from three suppliers: A, B, and C. Supplier A provides 50 percent of the chips, Supplier B provides 30 percent, and Supplier C provides the remaining 20 percent. The probability that a chip from Supplier A is defective is 0.02, from Supplier B is 0.04, and from Supplier C is 0.05.
If a chip is selected at random from the manufacturer's total inventory, what is the probability that the chip is defective?
- 0.032
- 0.037
- 0.110
- 0.020
- 0.055
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