In a motor of 120 machine parts, 5% parts were defective. In another motor of 80 machine parts, 10% parts were defective. For the two motors considered together, the percentage of defective machine parts were:
7
Here's how to solve this problem step-by-step:
- Calculate the number of defective parts in the first motor:
The first motor has 120 machine parts, and 5% are defective. Therefore, the number of defective parts is \(120 \times \frac{5}{100} = 6\).
- Calculate the number of defective parts in the second motor:
The second motor has 80 machine parts, and 10% are defective. Therefore, the number of defective parts is \(80 \times \frac{10}{100} = 8\).
- Calculate the total number of defective parts:
The total number of defective parts in both motors is \(6 + 8 = 14\).
- Calculate the total number of machine parts:
The total number of machine parts in both motors is \(120 + 80 = 200\).
- Calculate the overall percentage of defective parts:
The overall percentage of defective parts is \(\frac{14}{200} \times 100 = 7\%\).
However, there seems to be a discrepancy. Let's re-examine the calculation. The question asks for the percentage of defective parts for the two motors *considered together*. The previous calculation is correct if it is asking for the percentage of defective parts, but the given options don't include 7%. It seems there's an error in either the question or the provided options. The correct calculation and answer are shown below.
- Total defective parts: 6 + 8 = 14
- Total parts: 120 + 80 = 200
- Percentage of defective parts: (14/200) * 100% = 7%
Similar Questions
A school has 8 periods of 45 minutes each, every day. How long will each period be if the school has to have 9 periods everyday, assuming the working hours to be the same?
A basket contains 300 mangoes. 75 mangoes were distributed among some students. Find the percentage of mangoes left in the basket.
The weights of two iron balls are 3.5 kg and 7.5 kg. What is the percentage weight of the 1st ball with respect to the 2nd ball?
If 35% of A's income is equal to 25% of B's income, then the ratio of A's income to B's income is
A man spends 15% of his income. If his expenditure is Rs. 75, his income (in rupees) is:
The price of rice has increased by 60%. In order to restore the original price, the new price must be reduced by
If "basis points" are defined so that 1 percent is equal to 100 basis points, then how many basis points is 82.5 percent greater than 62.5 percent?
In the last financial year, a car company sold 41,800 cars. In this year, the target is to sell 51,300 cars. By what percent must the sale be increased?
Numbers of boys and girls are 'x' and 'y' respectively; ages of a girl and a boy are 'a' years and 'b' years respectively. The average age (in years) of all boys and girls is:
A number is decreased by 10% and the resulting number is again decreased by 20%. What is the final percentage of decrease?
Important Questions from Percentage
In an examination, 25% of the candidates failed in Mathematics and 12% failed in English. If 10% of the candidates failed in both the subjects and 292 candidates passed in both the subjects, which one of the following is the number of total candidates appeared in the examination?
What is the value of 9% of 5500 + 2.4% of 1100 - 40% of 1600?
Population of a village is 7960 in which 4660 are female. If in that village 60% are literate in which 70% female are literate, then what is the number of literate male ?
The numbers of students of three classes of a school are in the ratio 4 : 5 : 6. If numbers of students in these classes increase by 25%, 20% and 25% respectively, then ratio of numbers of students will become:
In an examination, Ram obtained 20 % more than Ashok but 10% less than Rajesh. If the marks obtained by Ashok is 1080. Then the Percentage marks obtained by Rajesh if the full marks is 2000 ;
