price of one pen is Rs.5 find the cost of 'n' pens?
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ɪᴛ ɪs ɢɪᴠᴇɴ ᴛʜᴀᴛ ᴛʜᴇ ᴘʀɪᴄᴇ ᴏғ ᴏɴᴇ ᴘᴇɴ ɪs ʀs. 5.
sᴏ ᴛʜᴇ ᴄᴏsᴛ ᴏғ ' n' ᴘᴇɴs ɪs 5n.
ᴘʀɪᴄᴇ ᴏғ ᴏɴᴇ ᴘᴇɴ= Rs. 5
sᴏ ᴛʜᴇ ᴘʀɪᴄᴇ ᴏғ ɴ ᴘᴇɴs= 5n