Question

It was found that water from a river was contaminated with Coliform bacteria. Which one
of the following pollutant might have got mixed with the water?
i) Fertilizer run off
11) Industrial waste
111) Pesticides
iv) Human faecal matter





please give right ansr​

Answer 1

Answer:

Explanation:

Calculate the mode of the following data

Marks obtained No of students

0-20 8

10

12

6

3

20-40

40-60

60-80

80-100

Answer 2

Answer:

all the options are right