Gloria is making bouquets with silk
2 answers:
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Set up a proportion
= 
Use cross-multiplication
= 
Simplify
x = 19.2
Use cross-multiplication
Simplify
x = 19.2
Answer: The probability that his friend doesn't make a shot until his 5 th attempt is 0.00128.
Step-by-step explanation:
Since we have given that
Probability of making his shot = 80%
Probability of missing his shot = 20%
We need to find the probability that his friend doesn't make a shot until his 5th attempt.
So, our required probability would be
Hence, the probability that his friend doesn't make a shot until his 5 th attempt is 0.00128.