Question

6. The rainfall (in mm) in a city on 7 days of a first week of July was recorded as follows: Day Monday Tuesday Wednesday Thursday Friday Saturday Rainfall (in mm) 3.5 6.0 12.2 5.6 9.8 2.2 Sunday 10.4 (a) Find the range of the rainfall. (b) Find the mean rainfall for the first week of July. (C) On how many days was the rainfall less than the mean rainfall ? (d) On how many days was the rainfall more than the mean rainfall ?​

Answer 1

Answer:

a)1.8

b)7.1

c)4

d)3

Step-by-step explanation:

a)range of rain fall is given by

range=maximum value - minimum value

that is range=12.2-10.4=1.8

b)

mean =(sum of the values)/(number of values)

mean=$\frac{3.5+6.0+12.2+5.6+9.8+2.2+10.4}{7}=\frac{49.7}{7}=7.1$

c)

less than  7.1 are 4

there 4 days less than mean rain fall

d)

greater than 7.1 are 3

there are 3 days greater than mean value