On 4 November to 7 November, an average of 56 puffs were sold and from 8th November to 12 November, an average of 26 puffs were sold. $230 worth of puffs were sold from 13 November to 23 November. Given that a puff was sold for $5, find the average number of puffs sold from 4 November to 23 November.
Number of puffs sold from 13 November to 23 November
= 230 ÷ 5
= 46

Number of days from 4 November to 7 November
= 7 - 4 + 1
= 4

Number of days from 8 November to 12 of November
= 12 - 8 + 1
= 5

Total number of puffs sold
= (4 x 56) + (5 x 26) + 46
= 224 + 130 + 46
= 400

Number of days from 4 November to 23 November
= 23 - 4 + 1
= 20

Average number of puffs sold
= 400 ÷ 20
= 20

Answer(s): 20