The following bar graph shows the data of the production of an item (in thousand tonnes) from four different companies A, B, C and D during the years mentioned.

In the five years given, the average production is highest in company ......... and lowest in company .........., respectively.

D; A

In A ,

Average production of A  = \(\frac{23 + 26 + 28 + 25+30}{5}\)

= \(\frac{ 132}{5}\)

= 26.4

In B ,

Average production of B = \(\frac{25+29+27+35+31}{5}\)

= \(\frac{ 147}{5}\)

= 49

In C ,

Average production of C  = \(\frac{28+31+36+28+35}{5}\)

= \(\frac{ 158 }{5}\)

= 31.6

In D ,

Average production of D  = \(\frac{32+35+40+46+50}{5}\)

= \(\frac{ 355}{5}\)

= 71

So , Average is highest of company D i.e. 71 and lowest of company A i.e. 26.4 .

Ans :- D ; A