A stall was selling flowers. ¹₃ of the earnings are from the sale of 10 marigolds and 13 tulips. Of the rest of the earnings, ²₃ are from the sale of marigolds and ¹₃ are from the sale of tulips. Each tulip costs twice as much as each marigold. How many flowers were sold?

10 marigolds and 13 tulips	Rest of the earnings		Total earnings
1x3	2x3
	Roses	Carnations
	2x2	1x2
3	4	2	9

Fraction of the earnings left after the sale of 10 marigolds and 13 tulips
= 1 - ¹₃
= ²₃ 

The rest of the earnings is repeated. LCM of 2 and 3 is 6.

Cost of 1 marigold = 1 u
Cost of 1 tulip = 2 u

Cost of 10 marigolds = 10 x 1 u = 10 u
Cost of 13 tulips = 13 x 2 u = 26 u

Total cost of 10 marigolds and 13 tulips
= 10 u + 26 u
= 36 u

³₉ of the earnings → 36 u 
¹₉ of the earnings → 36 u ÷ 3 = 12 u 

⁴₉ of the earnings → 4 x 12 u = 48 u 

Number of marigolds sold that contributed to the rest of the earnings
= 48 u ÷ 1 u
= 48

²₉ of the earnings → 2 x 12 u = 24 u

Number of tulips sold that contributed to the rest of the earnings
= 24 u ÷ 2 u
= 12

Number of flowers sold
= 10 + 13 + 48 + 12
= 83

Answer(s): 83