Percentage
- A marketing manager is able to manage an average of Rs240 per week during 40h week . But in the final week of the month, his rates are increased by 50%. Then find out the commission the marketing manager makes in that week, if he puts in 60h during that final week?
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Total commission = New rate after increase x Total hours in the week.
Correct Option: B
Average rate per hr = 240/40 = Rs6/hr
In last week, his rate per hour increases by 50%,
so in the last week, his hourly rate = Rs.6 x (1+50%)= Rs.9
Total hour spent in final week = 60h
∴ Total commission = 60h x Rs.9/hr = Rs.540
- From the salary of an officer 10% deducted as house rent,15% of the rest he spends on children's eduction and 10% of the balance, he spends on clothes. After this expenditure he is left with Rs. 1377. His salary is ?
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Suppose that his salary = Rs. 100
House Rent = Rs.10
so, Balance = Rs. 90
Expenditure on education = Rs. (15 x 90) / 100= Rs.13.50
Balance =Rs.76.50
Expenditure on clothes = Rs.(10 x 76.50) / 100 = Rs. 7.65
Balance now = Rs.68.85
If balance is Rs. 68.85, salary =Rs. 100Correct Option: A
Suppose that his salary = Rs. 100
House Rent = Rs.10
so, Balance = Rs. 90
Expenditure on education = Rs. (15 x 90) / 100= Rs.13.50
Balance =Rs.76.50
Expenditure on clothes = Rs.(10 x 76.50) / 100 = Rs. 7.65
Balance now = Rs.68.85
If balance is Rs. 68.85, salary =Rs. 100
If balance is Rs. 1377, salary = Rs.(100/68.85) x 1377 = Rs. 2000
- The price of cooking oil has increased by 25%. The percentage of reduction that a family should effect in the use of cooking oil so as not to increased the expenditure on this account is ?
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Reduction in consumption = { m / (100 + m)} x 100%
Correct Option: B
Reduction in consumption = { m / (100 + m)} x 100%
= (25/125) x 100%
= 20%
- Out of a total 85 children playing badminton or table tannins or both,total number of girl in the group is 70% of boys in the group. The number of boys playing only badminton is 50% of the number of boys and the total number of boys playing badminton is 60% of the total number of boys. The number of children playing only table tennis is 40% of the total numbers of children and a total numbers of children and a total 12 children play badminton and table tennis both. What is the number of girls playing only badminton ?
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Let the number of boys = x
then x + 7x/10 = 85
⇒ x = 50
∴ No. of girls = 85 - 50 = 35
(i) Number of boys playing only badminton =50% of boys
= 50/100 x 50 = 25Correct Option: B
Let the number of boys = x
then x + 7x/10 = 85
⇒ x = 50
∴ No. of girls = 85 - 50 = 35
(i) Number of boys playing only badminton =50% of boys
= 50/100 x 50 = 25
(ii) Number of children playing only table tennis
= 40% of total no. of children
= 40/100 x 85 = 34
(iii) Total no. of children playing both badminton and table tennis = 12
Hence, number of girls playing only badminton = 85 - (25 + 34 + 12)
= 85 - 71 = 14.
- In an examination, 40% students failed in Hindi, 50% student failed in English. If 21% student failed in both the subject find the percentage of those who passed in Hindi ?
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Clearly, it is given that 40% failed in Hindi.
Correct Option: D
Clearly, it is given that 40% failed in Hindi, so those who passed in Hindi = (100 - 40)% = 60%
