Lea124
#1
Study Sesson 16, Reading 58, practice problem #12

I can’t figure out what I’m doing wrong.

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So…

**C = (99.1085+100.9011-200) / [(200)(0.0025)] = 0.0096/0.5 = 0.0192.**

However they give the answer **C = 7.68**

What am I doing wrong? Thanks!

cpk123
#2
**all four** --> 4 * 0.0192 = 0.0768?

Lea124
#3
Never would have got that. Thanks!

Lea124
#4
Actually, it turns out the book gave the formula incorrectly. You must square the change in yield in the denominator.

So

**C = (99.1085+100.9011-200) / [(200)(0.0025^2)] = 0.0096/0.00125 = 7.68**