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1. He saves Rs. 3534 which is 19% (100-81)
So, His monthly income (100%) is (100/19) x 3534 = Rs. 18600
Yearly income is 18600 x 12 = Rs. 223200
Important Note : Here we intentionally gave 18600 as the 1st answer option. In competitive exams we hurriedly choose the answer option as soon as we get a number which tallies with the given options. But here, we've asked about annual (yearly) income. Not monthly income. So, the answer will be 12 times 18600 i.e., Rs. 223200. Beware friends, IBPS is more cunning than you think.
2. 42 - 28 = 14% = 210
3. Let the numbers be X and Y
48% X = 36% Y
X/Y = 36/48
=> X:Y = 36:48 = 3:4
4. Let the third number be 100
So, First number = 100 + 30% of 100 = 130
and Second number
= 100 + 40% of 100 = 140
So, percentage of the first number to the second number = (130/140) x 100 = 92 (6/7)
5. Required percentage reduction is (X/(100+-X)) x 100
here X is +20 (since Sugar price increased)
So, percentage reduction = (20/120) x 100 = 16(2/3)%
6. Let the first number be "X" and second number be "Y"
So, Y = (1/4) x 2400 = 600
(6/11) of X = 22% of 600 = 132
=> X = 132 . (11/6) = 242
So, 45% of 242 = 108.9
7. Let the price of the article be Rs. 10 and the number of articles be 10.
So, the revenue is 10 X 10 = Rs. 100
New price of the article is 80% of 10 = Rs. 8
New number of articles is 130% of 10 is 13
New revenue is Rs. 8 x 13 = Rs. 104
So, effect in the revenue is 104 -100 = Rs. 4
percentage effect is (4/100) x 100 = 4%
8. Ritu marks = 56% of 875
Smita marks = 92% of 875 = 805
Rina marks = 634
Total marks = 490 + 805 + 634 = 1929
So, Average marks = 1929/3 = 643
9. Total expenditure is 25% + 20% + 30% = 75%
Monthly savings is 100 - 75 = 25%, which is Rs. 3350
Monthly income is (100/25) x 3350 = Rs. 13400
So, Annual income is
12 x Rs. 13400 = Rs. 160800
10. Minimum marks required = 163 + 327 = 200
if 50 are the minimum marks then maximum marks = 100
here 200 are the minimum marks then maximum marks = (100 x 200) / 50 = 400
11. 40% - 25% = 7 - (-38)
=> 15% = 45
So, Total marks (100%) are (100/15) x 45 = 300
12. Sugar quality is 30 % of 8 = 2.4
Sugar quantity will be the same in the remaining solution as only water evaporates when boiled.
So, required percentage of sugar is
(2.4/6) x 100 = 40%
13. Milk quantity is 80% of 90 = 72 litres and water is 90 - 72 = 18 litres
after adding water, water will be 25% and milk will be 75%
As there is no change in the quantity of milk, 75% quantity is 72 litres
25% (water) quantity is (25/75) x 72 = 24 litres
Added quantity of water is 24-18 = 6 litres
14. Ruchika's monthly income = Rs. 32,000
so, Ravina's monthly income = 115% of 32000 = Rs. 36800
Ramola's monthly income = 3 x 36800 = Rs. 110400
So, Ramola's annual income = 12 x 110400
= Rs. 13,24,800
15. Let the population of the town 2 years ago was X
So, 115% of 90% of X = 12420
=> (115/100) . (90/100) . X = 12420
=> X = 12000
16. 32% + 70 = 350
= > 32% = 280
So, total marks (100%) = (100/32) x 280 = 875
17. Number of boys who failed is 25% of 800 = 200
Number of girls who failed is 20% of 600 = 120
Total number of students failed is 200 + 120 = 320
So, required percent is ((320 / (80 + 600)) x 100 = 22.86%
18. Akash's marks in subject "A" = 73
marks in subject "B" = 56% of 150 = 84
Total marks in all the three subjects
= 54% of 450 = 243
So, his marks in Subject "C" = 243 - (73+84) = 86
19. Let the number of males = "X"
then the number of females will be (6000 - X)
So, 8% of X + 10% of (6000-X) = 530
8X + 6000 - 10X = 53000
2X = 7000 = > X = 3500
20. Let the length be 10 and breadth also be 10.
So, Area = 10 x 10 = 100
New Length (10% excess) = 11
New Breadth (5% deficit) = 9.5
New area = 11 x 9.5 = 104.5
So, Change in area = 104.5 - 100 = 4.5
Percentage change = (4.5/100) x 100 = 4.5%
21. The required % = ((25 / (100-25)) x 100 = 33(1/3)%
22. 115% of 92% of 132
(115/100) x (92/100) x 132 = 139.656
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really good for ever
ReplyDeleteThanku sir
ReplyDeleteSuperb Explanation
thank u mam:)
ReplyDeletehi....gud eve
ReplyDeleteya i selected option 1, 18600 ithout noticing annual income is aked, then corrected it
ReplyDeletegud evening ..
ReplyDeleteandhra kada nuvvu
q.5 i think ans is 25% plz check.. frnds reply for dat question
ReplyDeletepls see on explanation post..
ReplyDeletethanks mam..really helpfull
ReplyDeleteThanx sir ...great explanation....once again thanx....
ReplyDeletethnk u so much sir....
ReplyDeletesir i think ther is a mistake in qstn 19...
ReplyDeleteGood approach
ReplyDeletesir i think there is a mistake in qstn 19...plzz chekk...
ReplyDeleteThank You :)
ReplyDeleteLast year my CWE PO-3 exam was on 19th november 2013(Odisha)...The supercyclone philine came & destroyed everything till 16th october & we the people of Odisha got electricity till 16th evening...Similar the case this year also(Cyclone "Hudhud")...I don't know why we the aspirants of Odisha suffer each year ???
ReplyDeletecheck once more.. i got 16(2/3)
ReplyDelete20-C-(20*C/100)=0
100-5C-C=0
100=6C
C=16(2/3)
Since consumption reduced C is taken as negative
Actual formula is a+b+(ab/100)
Since there is no change in exp it is equated to zero
good work
ReplyDeletePlease provide test for data interpretation
ReplyDeleteHaha...can understand
ReplyDeletesimple method :-
ReplyDelete120-->20
100-->??
120/20-6
100/6-16(2/3)...
simple method :-
ReplyDelete120-->20
100-->??
120/20-6
100/6-16(2/3)..
yaa seen thanks :)
ReplyDelete18600*12 =annual
ReplyDeleteq 19 males increases by 8%.so x*108/100 will come .I can't understand that problem.please help me
ReplyDeletethanks:)
ReplyDeletequestion 9 ans is 170800
ReplyDeletei have doubt in 20 th prob.its mentioned in question that its rectangle...can v take 10*10..length =breadth ?????
ReplyDeleteawsumm
ReplyDeletetaking 10 is easy for calculation
ReplyDeletewhy there is a waiting for approval before posting any comment. can anyone clarify this?
ReplyDeletethanks a lot team :)
ReplyDeletety vidhya... but wnt it become square then???
ReplyDelete6530-6000=530;this 530is wat the added 8%of male and 10%of female;
ReplyDeleteso 8%of male +10%female=530;female=6000-male;re
can some one explain me 21 st question
ReplyDeletesame with me.Last year my exam was on 19th october and this year 12th october.
ReplyDeleteno, it is percentage increase
ReplyDelete28/40
ReplyDeletethanks mam it is very usefull
ReplyDeleteshare marketing specialization pdf for ibps SO
ReplyDeleteHello Gr8ambitionz TEAM plz plz plz plz provide capsule for IT OFFICER ..
ReplyDeleteSuper explanation sir
ReplyDelete