Types of Mean

Q1. A car travels equal distances at speeds 30km/h and 60km/h. What is the average speed for the whole trip?

A) 40 km/h B) 45 km/h C) 48 km/h D) 50 km/h

Q2. The marks of a student in three subjects are:4,9 and 16. What is the Geometric Mean of these marks?

A) 8.38 B) 8.6 C) 7.5 D) 8.32

Q3. The ages of 5 friends are: 18,20,22,24,26 years. What is their Arithmetic Mean (average)?

A) 22 B) 23 C) 24 D) 20

Q4. A student got the following marks: \(\bullet\) Maths: 90 out of 100 \(\bullet\) Physics: 50 out of 75 \(\bullet\) Chemistry: 40 out of 75 What is the Weighted Mean score?

A) 68 B) 63 C) 72 D) 61

Q5. A runner changes speed during practice: \(\bullet\) First 10 minutes: 6 km/h \(\bullet\) Next 10 minutes: 8 km/h \(\bullet\) Last 10 minutes: 10 km/h What is the Root Mean Square (RMS) ?

A) 9.1560 B) 8.2534 C) 8.1650 D) 8.4586

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