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An examination consists of 25 multiple choice questions each with five alternatives only one of which is correct. It is decided to subtract one mark for each incorrect answer and to award four marks for each correct answer. Find the mean mark for a candidate whose chance of correctly answering each question is 0.8?

a.) 20

b.) 40

c.) 65

d.) 75
in Technology by Diamond (53,765 points) | 78 views

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