identify the green house gas
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0
Answer:
Greenhouse gases are those gases in the atmosphere that have an influence on the earth's energy balance.
example: Co2 ,methane,nitrous oxide etc.
Hope you get it.!!
Answered by
0
Answer:
Mean or Average is calculated by dividing the total sum of all items by the total number of items.
In this question, we have to add all the marks and divide it by total number of students.
Class - (1)
No. of students = 100
Mean marks = 30
Then, Total marks = 100 × 30 = 3000
Class - (2)
No. of students = 50
Mean marks = 60
Total marks = 50 × 60 = 3000
Find the mean marks of both classes:
= Total marks / Total no. of students
= 3000 + 3000 / 100 + 50
= 6000 / 150
= 40
\therefore∴ The mean marks of two classes taken together is 40 (Option A).
Note:-
Sometimes average is asked instead of mean. Both are synonymous to each other.
Always add the all total at the last for final answer.
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