Study the given table and answer the question that follows.

The table shows the yearly production (in thousands) of scooters in five different factories (P, Q, R, S and T) from 1985 to 1989.

Factory	1985	1986	1987	1988	1989
P	20	15	24	13	17
Q	16	23	41	20	15
R	14	21	30	16	12
S	25	17	15	12	22
T	40	32	39	41	35
Total	115	108	149	102	101

In which year was the total production of scooters of all factories 20% of the total production of scooters from 1985 to 1989?

The correct answer is 1985.

To find the year in which the total production of scooters of all factories was 20% of the total production of scooters from 1985 to 1989, we follow these steps:

Step 1: Calculate the overall total production of scooters from 1985 to 1989.
We sum the total production of each year as given in the 'Total' row of the table:
$\text{Total Production}=115+108+149+102+101$
$\text{Total Production}=575\text{ thousands}$

Step 2: Find 20% of the overall total production.
We calculate 20% of 575:
$20\%\text{ of }575=\frac{20}{100}\times 575$
$=0.2\times 575$
$=115\text{ thousands}$

Step 3: Identify the year matching this calculated value.
Looking at the 'Total' row in the table, the total production of scooters of all factories was 115 thousand in the year 1985.