I'm not quite sure what this article is about. All the answers seem relevant to the question because I have no context of the article. Could you leave a file of the article?
Explanation:
The score of Sachin in consecutive five innings at 80, 90 ,100, 100 and M respectively.
The average of the five innings is 100.
We need to find the value of M.
Average = sum of observations/total no of observations
Sum of observations = 80+90+100+100+M
= 370 + M
Total no. of observations = 5
Put all the values,

So, he scored 130 in his last innings.
He scored (130-80 = 50) more in his last innings as compared to the first inning scored.
Answer:
B is the answer.
Explanation: I got it correct on plato. Thank me later ;)
because graet gatsby was written in the following sentences and that will be D