Mathematics
Out of 100 numbers, 20 were 4s, 40 were 5s, 30 were 6s and the remaining were 7s. The mean of the numbers is :
5.3
5.4
6.1
6.5
Measures of Central Tendency
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Answer
| Number (x) | Frequency (f) | fx |
|---|---|---|
| 4 | 20 | 80 |
| 5 | 40 | 200 |
| 6 | 30 | 180 |
| 7 | 10 | 70 |
| Total | ∑ f = 100 | ∑ fx = 530 |
By formula,
Hence, option 1 is the correct option.
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