A stall was selling flowers. ¹₄ of the earnings are from the sale of 10 orchids and 20 tulips. Of the rest of the earnings, ²₅ are from the sale of orchids and ³₅ are from the sale of tulips. Each tulip costs thrice as much as each orchid. How many flowers were sold?

10 orchids and 20 tulips	Rest of the earnings		Total earnings
1x5	3x5
	Roses	Carnations
	2x3	3x3
5	6	9	20

Fraction of the earnings left after the sale of 10 orchids and 20 tulips
= 1 - ¹₄
= ³₄ 

The rest of the earnings is repeated. LCM of 3 and 5 is 15.

Cost of 1 orchid = 1 u
Cost of 1 tulip = 3 u

Cost of 10 orchids = 10 x 1 u = 10 u
Cost of 20 tulips = 20 x 3 u = 60 u

Total cost of 10 orchids and 20 tulips
= 10 u + 60 u
= 70 u

⁵₂₀ of the earnings → 70 u 
¹₂₀ of the earnings → 70 u ÷ 5 = 14 u 

⁶₂₀ of the earnings → 6 x 14 u = 84 u 

Number of orchids sold that contributed to the rest of the earnings
= 84 u ÷ 1 u
= 84

⁹₂₀ of the earnings → 9 x 14 u = 126 u

Number of tulips sold that contributed to the rest of the earnings
= 126 u ÷ 3 u
= 42

Number of flowers sold
= 10 + 20 + 84 + 42
= 156

Answer(s): 156