To find the probability of a loss add .2 and .64 together. You will get .84. The remaining .16 is the probability of a loss. The probability of a loss is .16.
Answer:
D, not B
Step-by-step explanation:
So using Pythagorean Theorem:

Yep, It's not B, But D.
Hope this helps!
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I attached a photo of my work below; I just screenshotted the photo you provided. I apologize in advance for any mistakes, it’s 1 am and I’m in need of some sleep. However, I hope it helps otherwise. Have a good one!