24% of 289 is 69.36 or 69 if you rounded. Hope it helps.
If you mean in decimal form then it would be 15.65
The probability that the bulb is good is 12/15.
Since we have taken 1 item out the remaining total is now 14, so the probability of getting a defective bulb is now 3/14.
Now you multiply the probabilities together to get (12/15)(3/14)=(4/5)(3/14)=12/70=6/35
The answer would be A because each side is being multiplied by 3
