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Dear Sir,
I came across this question on the Becker revision kit :
You have just timed a person doing a haircut for the first time. It took 50mins. What is the learning rate if the person took 35 minutes on the second haircut? 15% / 30% / 70% / 85%
I approached this in 2 ways but cannot identify the correct answer.
Method 1 :
50mins + 35mins = 85mins total / 2 = average 42.5mins
42.5 / 50 = 0.85 x 100 = 85%Or
Method 2 :
35mins / 50mins = 0.7 x 100 = 70%
What should be the correct answer in this case? The answer on the kit is 85%.
Thanks
The answer in the kit is correct!!!
There is only one correct way to approach it (what you have called method 1).
I suggest that you watch my free lectures on learning curves because I work through a similar example and explain why we do it this way.
The lectures are a complete free course for Paper F5 and cover everything needed to be able to pass the exam well.
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