The Table given below presents the Rainfall (in mm)in two cities on different days of a week.
|
Days |
Rainfall (in mm) |
|
|
City 1 |
City 2 |
|
|
D1 |
82 |
81.6 |
|
D2 |
78 |
79.4 |
|
D3 |
76.2 |
78.3 |
|
D4 |
81.6 |
77.7 |
|
D5 |
79.4 |
84 |
|
D6 |
84 |
83 |
|
D7 |
83.8 |
82 |
What is the difference (correct up to two decimal places) in average rainfall in two cities per day?
Answer & explanation
Correct answer: option 2
⇒ Average rainfall of city 1 = \(\frac{82+78+76.2+81.6+79.4+84+83.8 }{7}\)
= \(\frac{ 565 }{7}\)
⇒ Average rainfall of city 2 = \(\frac{ 81.6+79.4+78.3+77.7+84+83+82 }{7}\)
= \(\frac{ 566 }{7}\)
⇒ Difference b/w average rainfall of two cities = \(\frac{ 566 }{7}\) - \(\frac{ 565 }{7}\)
= \(\frac{ 1 }{7}\)
= 0.15 (correct up to two decimal places)