Question

In the following matrix, row and column totals are given. Find the value of one missing row's total:

A	B	B	C	30
B	A	B	C	30
B	D	D	D	30
C	A	D	C	?
30	30	32	37

1. 31
2. 34
3. 39
4. 38

Answer 1

Correct Answer - Option 3 : 39

In this type of questions, sum of all the columns and all the rows should be the same because the alphabets are same.

So, Total of columns = total of rows 

Total of Columns = 30 + 30 + 32 + 37 = 129

Now, total of rows also should be 129

So, 30 + 30 + 30 + ? = 129

→ ? = 129 - 90

? = 39

Hence, 39 is the correct answer.