Question

3) I have a total of 300 in coins of denomination 3 1,32 and 35. The
number of coins is 3 times the number of 5 coirs. The total number of
coins is 160. How many coins of each denomination are with me?​

Answer 1

Aɴsᴡᴇʀ ：—

Lᴇᴛ ᴛʜᴇ ɴᴏ. ᴏғ 5 ᴄᴏɪɴs ʙᴇ » x

Tʜᴇ ɴᴏ. ᴏғ ₹2 ᴄᴏɪɴs » 3x

ɴᴏ. ᴏғ ₹1 ᴄᴏɪɴs » 〈160-(x+3x)〉

» 160-4x

Aᴄᴄᴏʀᴅɪɴɢ ᴛᴏ ǫᴜᴇsᴛɪᴏɴ ：－

160-4x+2×3x+5x » 300

160-4x+6x+5x » 300

160-4x+11x » 300

7x » 300-160

7x » 140

x » 140/7

x » 20

Nᴏ ᴏғ ₹5 ᴄᴏɪɴs » 20

Nᴏ ᴏғ ₹2 ᴄᴏɪɴs » 3×20

» 60

ɴᴏ ᴏғ ₹1 ᴄᴏɪɴs » 160-4x

» 160-4×20

» 160-80

» 80

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