All I understand here is that it is a question of binomial deviation where the particular case is of standard deviation i.e ( I familiarise it with the bell curve.an image has been attached.) .I am aware that there is a table to calculate for particular values of X.But what about the following two cases?
... consider me as 'not so well versed person' in this topic and explain me as simplified as you could. Thank you. P.s if someone could post a detailed solutions,you could leave the understanding part on me.. Just in case this question feels incomplete or has some ambiguity please let me know.