Home
Class 14
MATHS
The proportion of students in three clas...

The proportion of students in three classes is `3 : 4 : 5` . If the number of students is increased by 20 in each class, then the proportion changes to `4 : 5 : 6` . What is the initial number of students in the three classes taken together ?

A

300

B

280

C

320

D

240

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

The ratio in the number of students in three classes is 3 : 4 : 5. If 20 students are increased in every class, then this ratio becomes 4 : 5 : 6. What was the original number of students in these classes taken together ? तीन कक्षाओं में विद्यार्थियों का अनुपात 3 : 4 : 5 है | यदि प्रत्येक कक्षा में 20 छात्र बढ़ा दिये जाते हैं तो अनुपात बदलकर 4 : 5: 6 हो जाता है| तीनों कक्षाओं को मिलाकर उनमें छात्रों की आरंभिक संख्या कितनी है ?

The proportion of the number of students in three classes is 1 : 2 : 3. If 20 students are included in each class, then the proportion becomes 3 : 5 : 7. What was initially the total number of students in the three classes? तीन कक्षाओं में छात्रों की संख्या का अनुपात 1 : 2 : 3 है | यदि प्रत्येक कक्षा में 20 छात्र शामिल कर लिए जाते हैं, तो यह अनुपात 3 : 5: 7 हो जाता है | इन तीन कक्षाओं में आरंभ में कितने छात्र थे?

The number of students in three classes are in the ratio 2 : 3:5. If 40 students are increased in each class, the ratio changes to 4:5:7. Originally, the total number of students was :

The students in three classes are in the ratio 2:3:5. If 40 students are increased in each class, the ratio changes to 4 : 5:7. Originally the total number of students was

The students in three classes are in the ratio 2:3:5. If 20 students are increased in each class, the ratio changes to 4:5:7. Originally the total number of students was :

The number of students in 3 classes are in the ratio 2:3:4. If 12 students are increased in each class, this ratio changes to 8:11:14. The total number of students in the three classes in the beginning was