Question

. तीन कक्षाओं में छात्रों का अनुपात 2:3:5 है। यदि प्रत्येक कक्षा में
-40 छात्र बढ़ा दिए जाते हैं, तो अनुपात बदलकर 4:5:7 हो जाता
है। प्रारम्भ में कितने छात्र थे?​

Answer 1

Answer:

Option (C) = 200 is correct.

Step-by-step explanation:

Given that, the ratio of number of students is 2 : 3 : 5

Let non-zero k be the common multiple

Then there are 2k, 3k and 5k mum of students in each class.

Total number of students is

= 2k + 3k + 5k = 10k

Another condition says,

(2k + 40) : (3k + 40) : (5k + 40) = 4 : 5 : 7

Then (2k + 40)/(2k + 40 + 3k + 40 + 5k + 40) = 4/(4 + 5 + 7)

or, (2k + 40)/(10k + 120) = 4/16

or, 8k + 160 = 10k + 120

or, 2k = 40

or, 10k = 200

Therefore the total number of students in the beginning was 200.

Answer 2

Answer:

Pehle total student

2:3:5 mtlb 2+3+5=10

Or bad me student

4:5:7 mtlb 4+5+7=16

To hm dekhte h ki yah pr 6 student ki bdotri hui h

16-10=6

Bt question me to 120 ki bta rhe h

40*3=120

To 6 ka man 120 k barabar kre 1 ka man 20hoga to Pehle student 10 h to 10*20=200

Step-by-step explanation: