find the probability of percentage of marks
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(ɪ) ɴᴜᴍʙᴇʀ ᴏꜰ ᴛᴇꜱᴛꜱ ɪɴ ᴡʜɪᴄʜ ᴛʜᴇ ꜱᴛᴜᴅᴇɴᴛ ꜱᴄᴏʀᴇᴅ ᴍᴏʀᴇ ᴛʜᴀɴ 70% ᴍᴀʀᴋꜱ = 3.
(ɪ) ɴᴜᴍʙᴇʀ ᴏꜰ ᴛᴇꜱᴛꜱ ɪɴ ᴡʜɪᴄʜ ᴛʜᴇ ꜱᴛᴜᴅᴇɴᴛ ꜱᴄᴏʀᴇᴅ ᴍᴏʀᴇ ᴛʜᴀɴ 70% ᴍᴀʀᴋꜱ = 3.∴ ᴘ(ᴍᴏʀᴇ ᴛʜᴀɴ 70% ᴍᴀʀᴋꜱ) = 3/6 = 1/2.
(ɪɪ) ɴᴜᴍʙᴇʀ ᴏꜰ ᴛᴇꜱᴛꜱ ɪɴ ᴡʜɪᴄʜ ᴛʜᴇ ꜱᴛᴜᴅᴇɴᴛ ꜱᴄᴏʀᴇᴅ ʟᴇꜱꜱ ᴛʜᴀɴ 70% ᴍᴀʀᴋꜱ = 3.
(ɪɪ) ɴᴜᴍʙᴇʀ ᴏꜰ ᴛᴇꜱᴛꜱ ɪɴ ᴡʜɪᴄʜ ᴛʜᴇ ꜱᴛᴜᴅᴇɴᴛ ꜱᴄᴏʀᴇᴅ ʟᴇꜱꜱ ᴛʜᴀɴ 70% ᴍᴀʀᴋꜱ = 3.∴ ᴘ(ʟᴇꜱꜱ ᴛʜᴀɴ 70% ᴍᴀʀᴋꜱ) = 3/6 = 1/2.
(ɪɪɪ) ɴᴜᴍʙᴇʀ ᴏꜰ ᴛᴇꜱᴛꜱ ɪɴ ᴡʜɪᴄʜ ᴛʜᴇ ꜱᴛᴜᴅᴇɴᴛ ꜱᴄᴏʀᴇᴅ ᴀᴛ ʟᴇᴀꜱᴛ 60% ᴍᴀʀᴋꜱ = 5.
∴ ᴘ(ᴀᴛ ʟᴇᴀꜱᴛ 60% ᴍᴀʀᴋꜱ) = 5/6
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