If 4 individuals in a laboratory population of 40 fruitflies died during a specific time (a week) interval, the death rate in the population per week is -

Options

A. 1
B. 0.1
C. 10
D. 400

Answer

To calculate the death rate in a population of fruit flies, we can follow these steps:

### Step-by-step Solution:

1. **Identify the total population**: In this case, the total population of fruit flies is given as 40.

2. **Identify the number of deaths**: It is stated that 4 individuals died during the week.

3. **Calculate the death rate**: The death rate can be calculated using the formula:
\[ \text{Death Rate} = \frac{\text{Number of Deaths}}{\text{Total Population}} \]
Substituting the values:
\[ \text{Death Rate} = \frac{4}{40} \]

4. **Simplify the fraction**:
\[ \text{Death Rate} = \frac{4}{40} = 0.1 \]

5. **Express the death rate per week**: Since the deaths occurred over a week, we can express this as a death rate of 0.1 per week.

### Final Answer:
The death rate in the population per week is **0.1**.

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