Find the mean of the marks obtained by both the groups of

Last updated: 6/26/2023

Find the mean of the marks obtained by both the groups of students taken together An assesses depreciated the machinery of his factory by 10 each in the first two years and by 40 in the third year and thereby claimed 21 average depreciation relief from taxation department bu the I T O objected and allowed only 20 Show which of the two is right