Question

9. A bag contains balls of two colours green and red. I have picked out a red ball. I
picked out one more with my eyes closed. What is the probability that I will make a
pair?​

Answer 1

Answer:

ɪᴛ ᴄᴀɴ ʙᴇ ᴏʙꜱᴇʀᴠᴇᴅ ᴛʜᴀᴛ ᴡʜɪʟᴇ ᴄʟᴏꜱɪɴɢ ᴛʜᴇ ᴇyᴇꜱ, ᴏɴᴇ ᴄᴀɴ ᴅʀᴀᴡ ᴇɪᴛʜᴇʀ ᴀ ʙʟᴀᴄᴋ ꜱᴏᴄᴋ ᴏʀ ᴀ ᴡʜɪᴛᴇ ꜱᴏᴄᴋ. ᴛʜᴇʀᴇꜰᴏʀᴇ, ᴛʜᴇʀᴇ ᴀʀᴇ ᴛᴡᴏ ᴩᴏꜱꜱɪʙʟᴇ ᴄᴀꜱᴇꜱ.

ᴩʀᴏʙᴀʙɪʟɪᴛy = `"ɴᴜᴍʙᴇʀ ᴏꜰ ꜰᴀᴠᴏᴜʀᴀʙʟᴇ ᴏᴜᴛᴄᴏᴍᴇ"/"ɴᴜᴍʙᴇʀ ᴏꜰ ᴩᴏꜱꜱɪʙʟᴇ ᴏᴜᴛᴄᴏᴍᴇꜱ"`

ᴩʀᴏʙᴀʙɪʟɪᴛy (ᴀ ᴩᴀɪʀ ᴏꜰ ᴡʜɪᴛᴇ ꜱᴏᴄᴋꜱ ᴡɪʟʟ ʙᴇ ꜰᴏʀᴍᴇᴅ) = `1/2`