Question

On 1st August, 2016, a survey was conducted in a restaurant regarding flow of customer, type of customer, collection of money at the counter. The results are compiled in the table below.

Only one bill is issued per single customer or per customer group. Group here means more than one customer at one time. This represents a typical day’s scenario and all working days of the month will show the same data on each day.

The average bill amount spend by customer in a group is approximately ___ times that spent by a customer when single?

• A. 0.9
• B. 0.8
• C. 1.2
• D. 0.7

Answer 1

The correct option is A

0.9

Total no. customers who came in a group = [80 + 50 + 28 + 30 + 100 + 72] = 360
Total bill amount spent by customers in a group= Rs $\left[\right(80\times 5.20)+(50\times 4.30)+(28\times 4)+(30\times 3.9)+(100\times 5.5)+(72\times 6\left)\right]=1842$
Average bill amount spent by customer in a group = $\frac{1842}{360}$ = Rs 5.12
Total number of single customers = 210 + 120 + 50 + 60 + 180 + 130 = 750
Total bill amount spent by single customers = Rs $\left[\right(6\times 210)+(4.8\times 120)+(4\times 50)+(4.2\times 60)+(5.8\times 180)+(6.1\times 130)=4701$
Average bill amount spent by customer who came single = Rs.5.50
Ratio = $\frac{5.12}{5.50}=0.9$ (approx)