SSC Government Jobs Exams Numerical Ability Averages

The average of 30 innings of a batsman is 20 and another 20 innings is 30. What is the average of all the innings?

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SSC Other Question

The average of 8 numbers is 21. Find the average of new set of numbers when 8multiplies every number. A cyclist travels to reach a post at a speed of 15 km/hr and returns at the rate of 10km/hr. What is the average speed of the cyclist