Directions : Read the data carefully and answer the following questions.
The table shows the average of the total number of laptops and phones sold, as well as the difference between the number of laptops and phones sold by five shops - A, B, C, D, and E.
Average of the total number of laptops and phones sold
Difference between the number of laptops and phones sold
Shop A
300
80
Shop B
225
100
Shop C
350
120
Shop D
375
60
Shop E
275
70
[Note: In each shop, the number of laptops sold is greater than the number of phones sold.]
Find the average of the number of phones sold by shop D and the number of laptops sold by shop B.
1.300
2.315
3.330
4.325
5.310
Correct Answer : 5
Solution :
Laptops and phones sold by shop A = 300 * 2 = 600
Laptops sold by shop A = (600 + 80)/2 = 340
Shops
Laptops + phones sold
Laptops - Phones sold
Laptops sold
Phones sold
A
600
80
340
260
B
450
100
275
175
C
700
120
410
290
D
750
60
405
345
E
550
70
310
240
Phones sold by shop D and laptops sold by shop B = 345 + 275 = 620
Hence, the required average = 620/2 = 310
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