Typist A can type a sheet in 5 minutes, typist B in 6 minutes and typist C in 8 minutes. The average number of sheets typed per hour per typist is ……. sheets.

Options

A. 8.83
B. 7.83
C. 7
D. None

Answer

To find the average number of sheets typed per hour per typist, we will follow these steps:

### Step 1: Calculate the number of sheets typed by each typist in one hour.
- **Typist A**: Can type a sheet in 5 minutes.
- In 60 minutes (1 hour), the number of sheets typed by A = 60 minutes / 5 minutes per sheet = 12 sheets.

- **Typist B**: Can type a sheet in 6 minutes.
- In 60 minutes, the number of sheets typed by B = 60 minutes / 6 minutes per sheet = 10 sheets.

- **Typist C**: Can type a sheet in 8 minutes.
- In 60 minutes, the number of sheets typed by C = 60 minutes / 8 minutes per sheet = 7.5 sheets.

### Step 2: Calculate the total number of sheets typed by all typists in one hour.
- Total sheets typed = Sheets by A + Sheets by B + Sheets by C
- Total sheets = 12 + 10 + 7.5 = 29.5 sheets.

### Step 3: Calculate the average number of sheets typed per typist.
- There are 3 typists, so the average number of sheets typed per typist = Total sheets / Number of typists
- Average = 29.5 sheets / 3 typists = 9.833 sheets (approximately).

### Final Answer:
The average number of sheets typed per hour per typist is approximately **9.83 sheets**.

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