RRB Junior Engineer / DMS / CMA 2015 · Question 17 of 480

The average marks of students of section A and B are respectively 60 and 70. The number of students in section A is 47 and in section B is 53. The average marks of both sections taken together are

Mathematics - Averages

Aa. 65.5
Bb. 65.3Correct
Cc. 65.6
Dd. 65.8

Answer: B. b. 65.3

Explanation

Average of both sections Total mark of both sections Total number of students both sections 60x47 + 70x53 2820+ 3710 0 + 2+ 4+ 6+ 8+10_30_5 47 + 53 100 6530 . 100 ' 65.3 20 ~ Railway Recruitment BoardsJuniorEngineer Solved Paper 2015

Source: Arihant RRB JE Solved Paper 26-Aug-2015 (3rd Shift), Q91–150 — published solved-paper compilation (Q1–90 technical not included in this source) · memory-based

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