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4. Daniel orders a large supply of LEDs from two different suppliers. The probability that an...

4. Daniel orders a large supply of LEDs from two different suppliers. The probability that an LED from Adafun is defective is 0.02 and the probability that an LED from Sparkfruit is defective is 0.05. In a supply of 180 LEDs, 100 were obtained from Adafun and 80 were obtained from Sparkfruit.

a. What is the probability that an LED chosen at random from the 180 is from Adafun?

b. What is the probability that an LED chosen at random from the 180 is defective?

c. If the chosen LED is defective, what is the probability that it came from Adafun?

Math   Statistics-And-Probability   
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