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.]
If the number of laptops and phones sold by shop F is 180 more than that by shop B, and the average number of laptops sold by shop A and shop F is 315, then find the number of phones sold by shop F.
1.310
2.340
3.290
4.300
5.280
Correct Answer : 2
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
Laptops and phones sold by shop F = 450 + 180 = 630
Laptops sold by shop F = 315 * 2 - 340 = 290
Hence, phones sold by shop F = 630 - 290 = 340
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