Question : Study the given table and answer the question that follows.
| Number of children | Number of families |
| 0 | 4 |
| 1 | 22 |
| 2 | 15 |
| 3 | 6 |
| 4 | 2 |
The average number of children per family is :
Option 1: 1.47
Option 2: 1.59
Option 3: 1.23
Option 4: 1.72
Correct Answer: 1.59
Solution :
Average number of children per family
$=\frac{\sum{\text{Number of children}\times\text{Number of families}}}{\sum{\text{Total number of families}}}$
$=\frac{0\times4+1\times22+2\times15+3\times6+4\times2}{4+22+15+6+2}$
$=\frac{22+30+18+8}{49}$
$=\frac{78}{49}$
$=1.59$
Hence, the correct answer is 1.59.
Related Questions
Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
| 3 | 2 | 38 | 5 |
| 5 | 3 | ? | 4 |
| 7 | 1 | 54 | 2 |
Option 1: 48
Option 2: 52
Option 3: 40
Option 4: 50
Question : Calculate the mean from the following table.
| Scores | Frequencies |
| 0-10 | 2 |
| 10-20 | 4 |
| 20-30 | 12 |
| 30-40 | 21 |
| 40-50 | 6 |
| 50-60 | 3 |
| 60-70 | 2 |
Option 1: 33.4
Option 2: 32.6
Option 3: 35.8
Option 4: 34.2
Question : The following table shows the number of centuries scored by cricketers in the past 5 years.
| Cricketers | Years | 2021 | 2020 | 2019 | 2018 | 2017 |
| A | 1 | 0 | 2 | 1 | 1 | |
| B | 1 | 2 | 0 | 0 | 1 | |
| C | 0 | 0 | 1 | 1 | 0 | |
| D | 0 | 1 | 1 | 0 | 1 | |
| E | 1 | 0 | 1 | 0 | 1 |
In which year the maximum number of centuries were scored?
Option 1: 2020
Option 2: 2018
Option 3: 2019
Option 4: 2021
Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
| ? | 8 | 11 |
| 7 | 6 | 5 |
| 48 | 63 | 72 |
Option 1: 7
Option 2: 5
Option 3: 6
Option 4: 4
Question : Directions: Select the missing number in the pattern from the given responses.
| 1 | 3 | 28 |
| 3 | 7 | 58 |
| 2 | 5 | 133 |
| 4 | 9 | ? |
Option 1: 97
Option 2: 88
Option 3: 91
Option 4: 106
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