Question

There are 100 students in 3 sections A, B and C of a class. The 2 marks of all the three sections was 84. The 2 of B and C was 87.5 and the 2 marks of students in A section was :
A) 20
B) 35
C) 54
D) 40

Answer 1

Answer:20

Step-by-step explanation:

Numbers of students in section A = x

∴ Numbers of students in section B and C = (100 – x)

∴ X × 70 + (100 – x) × 87.5 = 84×100

=> 70x + 87.5× 100 – 87.5x=8400

=>x=20

Answer 2

ᴋɪɴᴅ ᴡᴏʀᴅs ᴄᴀɴ ʙᴇ sʜᴏʀᴛ ᴀɴᴅ ᴇᴀsʏ ᴛᴏ sᴘᴇᴀᴋ, ʙᴜᴛ ᴛʜᴇɪʀ ᴇᴄʜᴏᴇs ᴀʀᴇ ᴛʀᴜʟʏ ᴇɴᴅʟᴇss
　　　　　　
　　　　　　　- ᴍᴏᴛʜᴇʀ ᴛᴇʀᴇsᴀ

ŋσш ɕσɱıŋɢ tσ ყσนг զนεรtıσŋ

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There are 100 students in 3 sections A, B and C of a class. The 2 marks of all the three sections was 84. The 2 of B and C was 87.5 and the 2 marks of students in A section was :
♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦✔A) 20✔✔✔
B) 35
C) 54
D) 40


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