Advertisements
Advertisements
Question
In a class, one out of every 5 students pass. If there are 225 students in all the sections of a class, find how many pass?
Solution
Total number of students in all sections = 225
Given, one of every five students pass
Total students pass = `225xx1/5` = 45 students
APPEARS IN
RELATED QUESTIONS
The monthly pocket money of Ravi and Sanjeev are in the ratio 5 : 7. Their expenditures are in the ratio 3 : 5. If each saves Rs. 80 every month, find their monthly pocket money.
Find the ratio compounded of the reciprocal ratio of 15 : 28, the sub-duplicate ratio of 36 : 49 and the triplicate ratio of 5 : 4.
Find the ratio of the following in the simplest fcrm:
a4 + b4 and a3 - b3
Find the duplicate ratio of the following :
`sqrt 10 : sqrt 14`
Find the third proportional of `1/7 "and" 3/14`
Make set of all possible proportions from the numbers 15, 18, 35 and 42.
If 25, 35 and x are in continued proportion, find the value of x.
Find the ratio of the first quantity to the second.
25 beads, 40 beads
Find the compounded ratio of: 2 : 3 and 4 : 9
Find the triplicate ratio of 3 : 4
Find the triplicate ratio of `(1)/(2) : (1)/(3)`
If (x – 9) : (3x + 6) is the duplicate ratio of 4 : 9, find the value of x.
In a mixture of 45 litres, the ratio of milk to water is 13 : 2. How much water must be added to this mixture to make the ratio of milk to water as 3 : 1 ?
The ratio of the number of sides of a square to the number of edges of a cube is ______.
A picture is 60 cm wide and 1.8 m long. The ratio of its width to its perimeter in lowest form is ______.
In a box, the ratio of red marbles to blue marbles is 7:4. Which of the following could be the total number of marbles in the box?
The ratio of the area of the shaded portion to that of the whole figure is ______.
The marked price of a table is Rs. 625 and its sale price is Rs. 500. What is the ratio of the sale price to the marked price?
In a college, out of 4320 students, 2300 are girls. Find the ratio of number of girls to the total number of students.
A doctor reports blood pressure in millimeters of mercury (mm Hg) as a ratio of systolic blood pressure to diastolic blood pressure (such as 140 over 80). Systolic pressure is measured when the heart beats, and diastolic pressure is measured when it rests. Refer to the table of blood pressure ranges for adults.
| Blood Pressure Ranges | |||
| Normal | Prehypertension | Hypertension (Very High) |
|
| Systolic | Under 120 mm Hg | 120-139 mm Hg | 140 mm Hg and above |
| Diastolic | Under 80 mm Hg | 80-89 mm Hg | 90 mm Hg and above |
Manohar is a healthy 37 years old man whose blood pressure is in the normal category.
- Calculate an approximate ratio of systolic to diastolic blood pressures in the normal range.
- If Manohar’s systolic blood pressure is 102 mm Hg, use the ratio from part (a) to predict his diastolic blood pressure.
- Calculate the ratio of average systolic to average diastolic blood pressure in the prehypertension category.
