The data given in the table shows the number of boys and girls enrolled in three different streams in a school over 5 years (2012 to 2020).
| Years | Arts | Science | Commerce | |||
| Boys | Girls | Boys | Girls | Boys | Girls | |
| 2012 | 48 | 36 | 40 | 35 | 35 | 45 |
| 2014 | 42 | 43 | 42 | 32 | 32 | 42 |
| 2016 | 45 | 42 | 38 | 30 | 36 | 38 |
| 2018 | 39 | 46 | 41 | 23 | 28 | 34 |
| 2020 | 36 | 43 | 39 | 30 | 39 | 41 |
What is the difference between the average of the number of boys in the Commerce stream for the 5 years and the average of the number of girls in the arts stream for the 5 years?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 8.
The average of the number of boys in the Commerce stream for the 5 years = 170/5 = 34.
The average of the number of girls in the arts stream for the 5 years = 210/5 = 42.
Required difference = 42 - 34 = 8.