To solve the given problems, we will calculate the typing speeds for each typist based on the information provided:
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How many words does Jane type in five minutes?
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Peter types 38 words per minute.
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Jane types 4 words less than Peter, so: \[ \text{Jane's typing speed} = 38 - 4 = 34 \text{ words per minute} \]
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In five minutes, Jane types: \[ \text{Words by Jane in 5 minutes} = 34 \text{ words/minute} \times 5 \text{ minutes} = 170 \text{ words} \]
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How many words does Mary type in ten minutes?
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Since Mary's typing speed is not provided, we'll need to assume that it is the same as Jane's (34 words per minute) unless stated otherwise.
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In ten minutes, Mary types: \[ \text{Words by Mary in 10 minutes} = 34 \text{ words/minute} \times 10 \text{ minutes} = 340 \text{ words} \]
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How many words do the three typists type altogether in one hour?
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First, calculate the number of words each typist types in one hour (60 minutes):
- Peter: \[ \text{Words by Peter in 60 minutes} = 38 \text{ words/minute} \times 60 \text{ minutes} = 2280 \text{ words} \]
- Jane: \[ \text{Words by Jane in 60 minutes} = 34 \text{ words/minute} \times 60 \text{ minutes} = 2040 \text{ words} \]
- Mary (assuming the same speed as Jane): \[ \text{Words by Mary in 60 minutes} = 34 \text{ words/minute} \times 60 \text{ minutes} = 2040 \text{ words} \]
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Now, add the number of words typed by each typist: \[ \text{Total words} = 2280 + 2040 + 2040 = 6360 \text{ words} \]
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Thus, the answers are:
- Jane types 170 words in five minutes.
- Mary types 340 words in ten minutes.
- The three typists type 6360 words altogether in one hour.