单选题Company A, Company B, and Company C are three Internet providers in a certain area of the country. The ratio of subscribers of A to B to C is 2:5:6. If there are a total of 65,000 subscriptions, how many of the 65,000 use Company A and Company C?A55, 000B40, 000C35, 000D30, 000E25, 000
单选题
Company A, Company B, and Company C are three Internet providers in a certain area of the country. The ratio of subscribers of A to B to C is 2:5:6. If there are a total of 65,000 subscriptions, how many of the 65,000 use Company A and Company C?
A
55, 000
B
40, 000
C
35, 000
D
30, 000
E
25, 000
参考解析
解析：
Find three numbers that add up to 65,000 and have a 2:5:6 ratio. 2x+5x+6x=65 000. 13x = 65 000, x=5,000.
The ratio of A to B to C is: (2×5,000): (5×5,000): (6×5,000)= 10,000: 25,000: 30,000. Therefore, Company A and Company C have a total of 10,000 + 30,000 = 40,000 subscribers.
Find three numbers that add up to 65,000 and have a 2:5:6 ratio. 2x+5x+6x=65 000. 13x = 65 000, x=5,000.
The ratio of A to B to C is: (2×5,000): (5×5,000): (6×5,000)= 10,000: 25,000: 30,000. Therefore, Company A and Company C have a total of 10,000 + 30,000 = 40,000 subscribers.
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