7, 6, 10, 8 and 9 are numbers and their frequencies are 2, 2, 5, 1, 2. Find their mean?
- 8
- 8.5
- 9
- None of these
Explanation
Find the mean of:
Numbers: 7, 6, 10, 8, 9
Frequencies: 2, 2, 5, 1, 2
Step 1: Multiply each number by frequency
7 × 2 = 14
6 × 2 = 12
10 × 5 = 50
8 × 1 = 8
9 × 2 = 18
Step 2: Sum of products
14 + 12 + 50 + 8 + 18 = 102
Step 3: Total frequency
2 + 2 + 5 + 1 + 2 = 12
Step 4: Mean
Mean = 102 ÷ 12 = 8.5
Last verified on 12-05-2026
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