Calculate Overall Average Spending per Member

To find the overall average amount spent per member across different groups, we calculate the total expenditure and divide it by the total number of members.

1. Calculate Total Number of Members

First, sum the number of members in each group to get the total number of members who visited the restaurant.

Total Members = Members in Group A + Members in Group B + Members in Group C

Total Members = $69 + 65 + 88 = 222$ members.

2. Calculate Total Spending for Each Group

Next, calculate the total amount spent by each group by multiplying the number of members in the group by their average spending.

• Total Spent by Group A = $69 \times ₹468 = ₹32292$
• Total Spent by Group B = $65 \times ₹120 = ₹7800$
• Total Spent by Group C = $88 \times ₹276 = ₹24288$

3. Calculate Overall Total Spending

Sum the total spending from all groups to find the total amount spent by everyone.

Overall Total Spent = Total Spent Group A + Total Spent Group B + Total Spent Group C

Overall Total Spent = $₹32292 + ₹7800 + ₹24288 = ₹64380$

4. Calculate Overall Average Spending per Member

Finally, divide the overall total spending by the total number of members to find the overall average amount spent per member.

Overall Average = Overall Total Spent / Total Members

Overall Average = $₹64380 / 222$

Overall Average = $₹290$

Result

The overall average amount spent per member at the restaurant is ₹290.