What percent of 120 are 90?
What percent of 120 are 90?
A. 25%
B. 50%
C. 75%
D. 33%
Explanation:
(?% /100) * 120 = 90
? = 75%
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A mixture of 70 liters of wine and water contains 10% water. How much water must be added to make water 12 ½% of the total mixture?
A mixture of 70 liters of wine and water contains 10% water. How much water must be added to make water 12 ½% of the total mixture?A. 12 liters
B. 10 liters
C. 4 liters
D. 2 liters
Explanation:
70 * (10/100) = 7
Wine Water
87 1/2% 12 1/2%
87 1/2% ——- 63
12 1/2% ——-? => 9-7=2If selling price is doubled, the profit triples. Find the profit percent:
If selling price is doubled, the profit triples. Find the profit percent:A. 66 2/3
B. 100
C. 105 1/3
D. 120
Explanation:
Let C.P. be Rs. x and S.P. be Rx. y.
Then, 3(y – x) = (2y – x) => y = 2x
Profit = (y – x) = Rs. (2x – x) = Rs. x
Profit % = x/x * 100 = 100%.A student who secures 20 % marks in an examination fails by 30 marks. Another student who secures 32 % marks gets 42 marks more than those required to pass. The percentage of marks required to pass is:________?
A student who secures 20 % marks in an examination fails by 30 marks. Another student who secures 32 % marks gets 42 marks more than those required to pass. The percentage of marks required to pass is:________?A. 20%
B. 25 %
C. 28%
D. 30%
Explanation:
20 % of x + 30 = 32 % of x – 42
Or 12 % of x = 72.
So, x = (72 ×100)/12 = 600
Pass marks = 20 % of 600 + 30 = 150
Pass Percentage =[1/4 x 100]%= 25 %The ratio of the number of boys and girls in a college is 7 : 8. If the percentage iikcrease in the number of boys and girls be 20% and 10% respectively, what will be the new ratio ?
The ratio of the number of boys and girls in a college is 7 : 8. If the percentage iikcrease in the number of boys and girls be 20% and 10% respectively, what will be the new ratio ?A. 8 : 9
B. 17 : 18
C. 21 : 22
D. Cannot be determined
Originally, let the number of boys and girls in the college be 7x and 8x respectively. Their increased number is (120% of 7x) and (110% of 8x), i . e . ( 120/100 X 7x ) and ( 110/100 X 8x ) i . e . 42x/5 and 44x/5 Required ratio = 42x/5 : 44x/5 = 21 : 22the present average age of a couple and their daughter is 35 years. Fifteen years from now, the age of the mother will be equal to the sum of present ages of the father and the daughter. Find the present age of mother?
the present average age of a couple and their daughter is 35 years. Fifteen years from now, the age of the mother will be equal to the sum of present ages of the father and the daughter. Find the present age of mother?A. 43 years
B. 40 years
C. 48 years
D. 45 years
E. None of these
Explanation:
(f + m + d)/3 = 35
=> f + m + d = 105 — (1)
m + 15 = f + d
Substituting f + d as m + 15 in (1), we get
2m + 15 = 105
2m = 90 => m = 45 years.A man purchases an electric heater whose printed price is 160 if he received two successive discounts of 20% and 10% he paid:
A man purchases an electric heater whose printed price is 160 if he received two successive discounts of 20% and 10% he paid:A. Rs. 112
B. Rs. 129.60
C. Rs. 119.60
D. Rs. 115.20
Explanation:
Price after 1st discount = 80% of Rs. 160 = Rs. 128Price after 2nd discount = 90% of Rs. 128 = Rs. 115.20