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The table below embodies data on the sales revenue (`in lakh) generated by a publishing house during the years 2012-15 while selling books, magazines and journals as three categories of items. Answer questions 19 – 21 based on the data contained in the table.
Items 2012 2013 2014 2015
Journals 46 47 45 44
Magazines 31 39 46 51
Books 73 77 78 78
Total
19). In 2015, approximately what percent of total revenue came from books ? (1) 45% (2) 55% (3) 35% (4) 25% [ 78/173into100= 45.01=45% Answer is(1)]
20). The number of years in which there was an increase in revenue from at least two categories of items, is (1) 0 (2) 1 (3) 2 (4) 3
[In 2012in 3items,in2013in2items, and in2014in2items thus 3times.Ans:- (4) ]
21) If the year 2016 were to show the same growth in terms of total sales revenue as the year 2015 over the year 2014, then the revenue in the year 2016 must be approximately : (1) 194 lakh (2) 187 lakh (3) 172 lakh (4) 177 lakh
[In2014 total sales is 169and in2015it is 173 In2016 it would have been 173into173/169=175.9 or 43+56+78=177 ans:- (4)]
A Universtiy professor maintains data on MCA students tabulated by performance and gender of the students. The data is kept on a computer hard disk, but accidently some of it is lost because of a computer virus. Only the following could be recovered :
Gender Average Good Excellent Total
Male 10
Female 32
Total 30
Panic buttons were pressed but to no avail. An expert committee was formed, which decided that the following facts were self evident : (a) Half the students were either excellent or good. (b) 40% of the students were females. (c) One-third of the male students were average.
Answer questions 22-24based on the data given above :
[ Explanations:-
Gender Average Good Excellent Total
Male 16 22 10 48
Female 24 8 0 32
Total 40 30 10 80
step1--40% are female, ie 60% are male ie 32into60/100=48 are male.then total students is42+38=80.
step2--1/3of male is average=1/3 into48=16
step3-- Half the students are either excellent or good.Then the remaining half or 40 is average.balance columns can be filled ]
22). How many female students are excellent ?
(1) 0 (2) 8 (3) 16 (4) 32 Answer is (1)
23). What proportion of female students are good ?
(1) 0 (2) 0.25 (3) 0.50 (4) 0.75 Answer (2)
24). Approximately, what proportion of good students are male ?
(1) 0 (2) 0.73 (3) 0.43 (4) 0.27 [22/30 Answer (2)]
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