Advertisements
Advertisements
प्रश्न
72% of 25 students are interested in mathematics. How many are not interested in mathematics?
Advertisements
उत्तर
It is given that 72% of 25 students are good in mathematics.
Therefore,
∴ Percentage of students who are not good in mathematics = (100 − 72)%
= 28%
∴ Number of students who are not good in mathematics = `28/100 xx 25`
= 7
Thus, 7 students are not good in mathematics.
APPEARS IN
संबंधित प्रश्न
Two positive numbers are in the ratio 3 : 5 and the difference between their squares is 400. Find the numbers.
If `a/b = c/d = e/f`, Prove that each of these ratios is equal to `(a + c + e)/(b + d + f)`.
The ages of two boys A and B are 6 years 8 months and 7 years 4 months respectively. Divide Rs. 3,150 in the ratio of their ages.
Find the mean proportional between 0.6 and 9.6
Write the following ratio in the simplest form:
3 weeks : 30 days
A factory produces electric bulbs. If 1 out of every 10 bulbs is defective and the factory produces 630 bulbs per day, find the number of defective bulbs produced each day.
Find the ratio of the price of a pencil to that of a ball pen if pencils cost Rs 96 per score and ball pens cost Rs 50.40 per dozen.
A hostel is to be built for schoolgoing girls. Two toilets are to be built for every 15 girls. If 75 girls will be living in the hostel, how many toilets will be required in this proportion?
In the following figure, the comparative areas of the continents are given: What is the ratio of the areas of
- Africa to Europe
- Australia to Asia
- Antarctica to Combined area of North America and South America.
Find the ratio of the following:
33 km to 121 km
