Question

Maria does chores of her mother to earn spending money?The last 4 weeks, she has earned 12 15 16 ant $10.What is the mean and range of her earnings of these four weeks

Answer 1

To find the mean and range of Maria's earnings over the last four weeks, we first need to list her earnings: $12, $15, $16, and $10.

**Step 1: Calculate the mean.**
The mean is calculated by summing all the amounts earned and then dividing by the number of weeks.

1. Sum of earnings:
\[
12 + 15 + 16 + 10 = 53
\]

2. Number of weeks:
\[
4
\]

3. Mean calculation:
\[
\text{Mean} = \frac{\text{Total Earnings}}{\text{Number of Weeks}} = \frac{53}{4} = 13.25
\]

**Step 2: Calculate the range.**
The range is calculated by finding the difference between the maximum and minimum earnings.

1. Maximum earnings:
\[
16
\]

2. Minimum earnings:
\[
10
\]

3. Range calculation:
\[
\text{Range} = \text{Maximum} - \text{Minimum} = 16 - 10 = 6
\]

**Conclusion:**
- The mean of Maria's earnings over the last four weeks is **$13.25**.
- The range of her earnings is **$6**.