Question : Study the given chart and answer the question that follows.
The chart shows the quantities of machines (M1, M2, M3) available in different stores (S1, S2, S3, S4).
Which stores have more number of M2 machines than the average number of M2 machines per store?
Option 1: S2 and S4
Option 2: S1 and S3
Option 3: S2 and S3
Option 4: S1 and S4
Correct Answer: S1 and S4
Solution :
Number of M2 machines in S1 = 14
Number of M2 machines in S2 = 8
Number of M2 machines in S3 = 8
Number of M2 machines in S4 = 12
$\therefore$ Average number of M2 machines per store = $\frac{14+8+8+12}{4}$ = $\frac{42}{4}$ = 10.5
⇒ S1 and S4 have more number of M2 machines than the average number of M2 machines per store.
Hence, the correct answer is S1 and S4.
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