The probability of the first item being good is 11/15.
Since we have taken 1 item out the remaining total is now 14, so the probability of getting a defective item is now 4/14.
Now you multiply the probabilities together to get (11/15)(2/7)=22/105
15 times percentage of 60 so i think it means it like 15/100 times 60/100
Use Conects it got all the math questions n got the answer to questions ahead of the one u looking for

The probability of getting 0 heads in 4 tosses (or equivalently, 4 tails) is

.
So the desired probability is