IBPS P.O mains question based on graph-1

The graph provided information gives the sales of books (in thousand numbers) from six branches of a publishing company during two consecutive years 2000 and 2001. Answer the questions based on this bar-graph:

Sales of books (in thousand numbers) from six branches-B1, B2, B3, B4, B5 and B6 of a publishing company in 2000 and 2001

Q.1) total sales of branches B1, B3 and B5 together for both the years (in thousand numbers) is:
(a) 250
(b) 310
(c) 435
(d)560
(e)585
Q.2) total sales of branch B6 for both the years is what percent of the total sales of branch B3 for both the years?
(a) 68.54%
(b)71.11%
(c) 73.17%
(d)75.55%
(e)77.26%
Q.3) what is the average sale of all the branches (in thousand numbers) for the year 2000?
(a)73
(b)80
(c)83
(d)88
(e)96
Q.4) what is the ratio of the total sales of branch B2 for both years to the total sales of branch B4 for both years ?
(a)2:3
(b)3:5
(c)4:5
(d)5:7
(e)7:9
Q.5)what percent of the average sales of branches B1, B2 and B3 in 2001 is the average sales of branches B1, B3 and B6 in 2000?
(a)75%
(b)77.5%
(c)82.5%
(d)85%
(e)87.5%

Explanation:
1.(d) total sales of branches B1,B3 and B5 for both the years (in thousand numbers)=(80+105)+(95+110)+(75+95)=560

2(c) required percentage=[(70+80)/(95+110)*100]%=(150/205*100)%=73.17%

3(b)average sales of all the six branches (in thousand numbers ) for the year 2000=1/6*(80+75+95+85+75+70)=80

4(e) required ratio=(75+65)/(85+95)=140/180=7/9

5(e)average sales(in thousand numbers of branches B1,B3,and B6 in 2000= 1/3*(80+95+70)=245/3

average sales(in thousand numbers of branches B1,B2,and B3 in 2001=1/3*(105+65+110)=280/3

therefore required percentage=[((245/3)/(280/3))*100]%=(245/280*100)%=87.5%