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RRB NTPC CBT I 10 Jan 2021 Shift 2 Paper

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Question : 8

Total: 100

The mean score of class A of 40 students in the mathematics test of 30 marks is 23. The mean score of class B of 45 students in the same test is 22. What is the ratio of the mean score of both the classes to that of class A?

380 : 391
391 : 382
390 : 382
382 : 391

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