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The bar graph shows the number of pens sold by two shops, A and B, in four consecutive months. Study the data and answer the question: Shop A: 1st month = 80, 2nd month = 70, 3rd month = 60, 4th month = 55. Shop B: 1st month = 40, 2nd month = 70, 3rd month = 85, 4th month = 75. Find the average of the number of pens sold by Shop A in the 1st and 3rd months and by Shop B in the 3rd and 4th months together.
- 75
- 85
- 72
- 78
Correct answer: 75
Solution
The required values are Shop A in the 1st and 3rd months and Shop B in the 3rd and 4th months: 80, 60, 85, and 75. Their sum is 300, and the average is 300 ÷ 4 = 75.
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