Question 67
The following table shows the number of pairs of shoes of 6 different brands sold by a shop during a given week.
The shop also sells brand B7 now. The number of pairs of shoes sold of B7 are 20% more than the average number of shoes sold of the other 6 brands. What is the number of pairs of shoes sold of B7?
Solution
The shop also sells brand B7 now. The number of pairs of shoes sold of B7 are 20% more than the average number of shoes sold of the other 6 brands.
number of pairs of shoes sold of B7 = (100+20)% of average number of shoes sold of the other 6 brands
= 120% of $$\frac{42+58+61+49+71+49}{6}$$
= 120% of $$\frac{330}{6}$$
= $$\frac{120}{100}\times\frac{330}{6}$$
= $$2\times33$$
= 66
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