The following table shows the number of employees working in four organisations during six years. Answer the questions that follow.

Organization	Year
	2010	2011	2012	2013	2014	2015
X	52	82	62	34	68	76
Y	105	80	120	160	95	100
Z	103	86	88	212	180	129
T	153	221	128	126	97	106

What is the average number of employees in organisations Y, Z and T in 2013?

Correct option is A

Given:
The number of employees working in four organizations during six years
Formula Used:
Average = $$\frac{(Sum \ of \ observations)}{(no. \ of \ observations)}$$​​
Solution:
Number of employees in organization Y, Z and T in 2013 are 160, 212,126 respectively.
Average of 160,212 and 126 is:
Average = $$\frac{ (Sum of observations)}{(no. of observations)} = \frac{(160+212+126)}{3} =\frac{498}{3} =166$$​​