percentage probz
1. Hursh wanted to subtract 5 from a no.Unfortunately, he added 5 instead of subtracting.Find the percentage change in the result?
A.300% B.66.66% C.50% D. 33.33% E. cannot be determined
2. In a class , 25% of the students were absent for an exam. 30% failed by 20 marks and 10% just passed because of grace marks of 5. find the average score of the class if the remaining students scored a average of 60 marks and the pass marks are 33 (counting the final score of the candidates)
A. 37.266 B. 37.6
C. 37.8 D. 36.93 E. 37.5
3. Hans and Bhaskar hav salaries that jointly amount to Rs. 10000 per month. They spend the same amount monthly and then it is found that the ratio of their savings is 6 : 1. Which of the following is Hans's salary?
A. 6000 B. 5000
C.4000 D.3000
4. The population of a village is 5500. If the no. of males increases by 11% and the no. of females increases by 20%, then the population becomes 6330. Find the population of females in town?
A. 2500 B.3000
C.2000 D.3500
5.A man buys a truck for Rs. 250000. The annual repair cost comes to 2% of the price of purchase. Besides he has to pay an annual tax of Rs. 2000. At what monthly rent must he rent out the truck to get a return of 15% on his net investment of first year?
A.3350 B.2500
C.4000 D.3212.50
6. The entrance ticket at the Minerval Theatre in Mumbai is worth Rs. 250. When the price of the ticket was lowered ,the sale of tickets increased by 50% while the collection recorded a decrease of 17.5%. Find the deduction in the ticket price?
A.150 B.112.50
C.105 D.120
In a class , 25% of the students were absent for an exam. 30% failed by 20 marks and 10% just passed because of grace marks of 5. find the average score of the class if the remaining students scored a average of 60 marks and the pass marks are 33 (counting the final score of the candidates)
A. 37.266 B. 37.6 C. 37.8 D. 36.93 E. 37.5
ANSWER:
25% absent => present 75x
30% failed by 20=> score = 13 and Total score = 30 x 13 = 390
10% passed with 5 grace marks=> score = 28 and Total score = 10 x 28 = 280
Remaining 35% got 60 marks => Total score = 35 x 60 = 2100
Total mark = 2770
Average = 2770/75 = 36.93 D
hello
the answer to Q. 2 is B.37.6 As it has been specified to consider the final score ,so it is 33 for the students who passed with grace marks.
Thus,390+330+2100/75 =(2820/75)*100 = 37.6%
and for Q. 1 ,i myself dont know the answer.
1> E
2> B
3> Confused .. All seem to be the answer
4> A
5> Didnt get
6> B
3. Hans and Bhaskar hav salaries that jointly amount to Rs. 10000 per month. They spend the same amount monthly and then it is found that the ratio of their savings is 6 : 1. Which of the following is Hans's salary?
A. 6000 B. 5000 C.4000 D.3000
puneet_champ is corrrect the question seems to be incorrect or missing some data
Let Hans's saalry be 3000 and their saving = x then
(3000-x)/(7000-x) = 1/6
=> x = 2200
again Let Hans's saalry be 4000 and their saving = x then
(4000-x)/(6000-x) = 1/6
=>x = 3600
so all the values are possibe
B is the only possible ans. , as the ratio is 6:1 not 1:6 .
so ,it goes as , let savings be 6x and 1 x
for A. 6000-6x = 4000-1x
2000=5x => x=400
possible
B. 5000-6x =5000-x
0=5x
not possible
C.4000-6x=6000-x
5x=-2000
D. 3000-6x= 7000-x
5x=-4000 ,again negative is not possible
Total investment for 1st year comes out to be 250000+5000+2000 = 257000
15% of 257000 = 38550
38550/12 = 3212.5
4. The population of a village is 5500. If the no. of males increases by 11% and the no. of females increases by 20%, then the population becomes 6330. Find the population of females in town?
M + F = 5500 ----> (1)
111/100 M + 120/100 F = 6330 ----> (2)
multiply the (1) with 111/100,
111/100 M + 111/100 F = 110/100 (5500) = 6105 -----> (3)
Subtract (3) from (2),
9/100 F = 225
F =( 225 * 100) / F = 2500
Total female members are 2500.
Hursh wanted to subtract 5 from a no.Unfortunately, he added 5 instead of subtracting.Find the percentage change in the result?
A.300% B.66.66% C.50% D. 33.33% E. cannot be determined
answer:
let the number be x
instead of x-5. . . .he made it x+5
% change in result = (x+5 - x +5)/(x-5) *100
So it 'll be depend on value of x
answer E. cannot be determined