The given table shows the number of employees in three organisations during three years.
| Organisation/Year | 2015 | 2016 | 2017 |
| L | 1421 | 1230 | 1652 |
| M | 1459 | 1825 | 1740 |
| N | 1620 | 1125 | 1235 |
What is the respective ratio between the total number of employees in organisations L and M together in 2015, and the total number of employees in organisations M and N together in 2017?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 576 : 595.
Required ratio = (Total employees in L and M in 2015) : (Total employees in M and N in 2017)
Total employees in L and M in 2015 = Employees in L in 2015 + Employees in M in 2015
⇒ 1421 + 1459
⇒ 2880
Total employees in M and N in 2017 = Employees in M in 2017 + Employees in N in 2017
⇒ 1740 + 1235
⇒ 2975
Required ratio = 2880 : 2975
Required ratio = 2880 ÷ 5 : 2975 ÷ 5
⇒ 576 : 595