Question

find out the Arithmetic mean from the following data-
marks no. of students
0-10 10
10-20 12
20-30 20
30-40 18
40-50 10
​

Answer 1

Answer:

ᴇǫᴜɪʟᴀᴛᴇʀᴀʟ ᴛʀɪᴀɴɢʟᴇ ɪs ʀᴇɢᴜʟᴀʀ ᴘᴏʟʏɢᴏɴ ᴡɪᴛʜ sɪᴅᴇs ʜᴀs ᴛʜᴇ ʟᴇᴀsᴛ ᴘᴏssɪʙʟᴇ ᴍɪɴɪᴍᴜᴍ ɪɴᴛᴇʀɪᴏʀ ᴀɴɢʟᴇ ʙᴇᴄᴀᴜsᴇ ᴛʜᴇ ʀᴇɢᴜʟᴀʀ ᴡɪᴛʜ ᴍɪɴɪᴍᴜᴍ sɪᴅᴇs ᴄᴀɴ ʙᴇ ᴄᴏɴsᴛʀᴜᴄᴛᴇᴅ ᴡɪᴛʜ sɪᴅᴇs ᴀᴛ ʟᴇᴀsᴛ.. sɪɴᴄᴇ, sᴜᴍ ᴏғ ɪɴᴛᴇʀɪᴏʀ ᴀɴɢʟᴇs ᴏғ ᴀ ᴛʀɪᴀɴɢʟᴇ = °

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